Chapter Summaries

Moriarty welcomed the first-year Slytherins to their dungeon, explained the House’s code of conduct, and oversaw the Shadow Prefect selection. Harry struggled with self-doubt after being unable to use magic, while Neville was chosen as Shadow Prefect; elsewhere, Draco and Ron also had a troubled first night.

• Moriarty led the first-year Slytherins to their common room, demonstrated his control over the moving staircases, and explained the Shadow Prefect rules.
• Moriarty revealed the Slytherin Dungeon’s password and taught the students a code centered on elegance, adaptability, Hogwarts loyalty, and honor earned through magical achievement.
• Neville Longbottom was chosen as Shadow Prefect, while Harry watched from the sidelines because he could not cast a spell.
• Harry was mocked and excluded by his dormmates, and he lay awake wondering whether he belonged in Slytherin.
• Draco and Ron fought in their shared Gryffindor dormitory, Ron wept after Dumbledore said nothing could be done about his condition, and Draco remained distressed by the Sorting.
• Violet entered Moriarty’s bedroom and invited him to bathe with her, and Tonks knocked on the door late that night.

Moriarty warned Harry to prepare for Potions, while Ron and Draco arrived late to Transfiguration and lost points. In Potions, Snape's complicated feelings about Lily and Harry gave way to anger, and he punished Harry and Ron before leaving Harry shaken by his hostility.

• Moriarty told Harry to be prepared for Potions, and Neville urged Harry to take the warning seriously.
• Professor McGonagall deducted twenty points each from Ron and Draco for arriving late to Transfiguration.
• Snape questioned Harry about potions, then explained the answers after Harry failed to respond.
• Ron caused an accident at his brewing station that injured Seamus, and Snape deducted twenty points from Ron.
• Snape blamed Harry for failing to stop Ron, deducted a point from Slytherin, and told Harry he should return to the Muggles.

After Snape humiliated Harry in Potions, Harry was mocked by Pansy and Nott, then cursed by Zabini until William intervened and took Zabini toward the Slytherin Dungeon. William secretly plotted to use Pansy and Draco in plans involving Moriarty, and the group encountered Marcus as they neared the dungeon.

• Snape criticized Harry's Potions work, and Draco said he had known Snape before but offered no help.
• Pansy insulted Harry, and Harry drew his Wand to challenge her and Nott; Zabini stepped in and cursed him with Rictusempra and Tarantallegra.
• William appeared, deducted ten points from Slytherin for Zabini's attack, dispelled Harry's curses, and ordered Zabini to accompany him to see Moriarty.
• Pansy offered to guide William to the common room and asked why Harry could not trade places with Draco, while William secretly considered how to use her and the Malfoy family.
• William, Zabini, Harry, and Pansy headed underground and saw Marcus approaching.

Moriarty confronted William over Voldemort’s influence on Slytherin and challenged William’s claims about Muggles, while Harry’s scar reacted to the soul fragment inside William. The fragment, unable to accept Moriarty’s position on Voldemort and the Slytherin Family, left to check Moriarty’s schedule and began plotting.

• Marcus brought Harry and Zabini to Moriarty in the Quidditch lounge, while William followed and found Moriarty’s core group gathered there.
• Moriarty kept Harry behind and discussed Harry’s conflict with Zabini as Jericho urged William to teach Slytherin’s first-years well.
• Harry’s scar burned when he looked toward William, and Moriarty realized William contained two souls, one of them Voldemort’s soul fragment.
• Moriarty argued that Muggles could threaten wizards and said Voldemort had distorted Salazar Slytherin’s ideals; William defended Voldemort’s views about Muggles.
• Voldemort’s soul fragment left the lounge, checked Moriarty’s class schedule, and saw that Moriarty had a Care of Magical Creatures class that afternoon.

Voldemort tried to use Ron Weasley to ambush Moriarty during Care of Magical Creatures class, but Ron became fixated on Professor Purlie and was kicked away by the Centaur. The chapter ended with Ron unconscious on the grass, still smiling.

• Voldemort hid near the valley and planned to target Moriarty’s companions, Lilith and Jericho, while William’s soul resisted his attempt to control Ron.
• Ron argued with George and Fred about his curse, then left Hagrid’s Hut and got lost on his way back to the Castle.
• Moriarty spoke with Firenze during Professor Purlie’s lesson, while Voldemort noticed Ron approaching the Centaurs and tried to cast the Imperius Curse on him.
• Ron became entranced by Professor Purlie’s rear and lunged at her as students shouted warnings.
• Professor Purlie kicked Ron in the chest and sent him flying onto the grass, where he passed out smiling.

After Ron was punished for groping Polly during Care of Magical Creatures, Voldemort reconsidered his plans and prepared to steal the Philosopher’s Stone. The next morning, Harry and Neville received their mail, and Neville spotted a letter from his Gran.

• Polly condemned Ron’s behavior, sent him to the Hospital Wing, and Moriarty later asked her about God’s Sigil.
• Voldemort abandoned plans to ambush Moriarty, overheard Snape asking for Harry to leave Slytherin, and resolved to steal the Philosopher’s Stone that night.
• Percy apologized to Moriarty for Ron, who had been treated for broken ribs but refused examinations from Dumbledore and the Heads of House.
• Harry and Neville went to sleep after hearing about Ron, then woke for their first Charms class the next morning.
• Hedwig delivered Harry a copy of The Daily Prophet, while Neville recognized an owl carrying a letter from his Gran.

Neville and Ron received Howlers that exposed their families’ anger, while Voldemort chose Ron and Draco as helpers in his plan to steal the Philosopher’s Stone. At the Hermes Club registration meeting, Hermione was called forward to take its first test.

• Neville opened a Howler from his grandmother, who objected to his being sorted into Slytherin and threatened to ask Dumbledore to sort him again.
• Mrs. Weasley’s Howler revealed that Ron had stolen the Earrings of the Egyptian Princess and demanded that he apologize or be taken home.
• Draco read Narcissa’s supportive letter, and Voldemort decided to use both Draco and Ron as helpers in his plan to steal the Philosopher’s Stone.
• William won Ron’s admiration by giving him attention in Defense Against the Dark Arts class, leaving Draco dejected.
• Soldaya introduced the Hermes Club at its registration meeting, where Hermione arrived with Penelope and was called to the podium for the first test.

Hermione passed the Hermes Club’s alchemy test, then saw Moriarty kissing Penelope and rushed to tell Zhang Qiu. Zhang Qiu explained that Moriarty had many admirers, admitted she liked him too, and left Hermione wondering about her own feelings.

• Hermione successfully completed the Gold Extraction Test, earned a gold bead, and celebrated joining the Hermes Club with Penelope.
• Penelope hurried away to meet Moriarty, and Hermione followed until she saw them kiss and leave together.
• Hermione lost track of Penelope and Moriarty, then went looking for Tonks and Zhang Qiu for help.
• Hermione found Zhang Qiu at dinner and told her that Moriarty was kissing Penelope.
• Zhang Qiu said Moriarty had many girlfriends and admitted that she liked him, leaving Hermione flustered as she considered her own feelings.

Cho Chang redirected Hermione’s questions about Moriarty, while Penelope spent the night with him in his private dormitory. At the Gryffindor Quidditch tryouts, William secretly cursed a Bludger to strike Ron, leaving him badly hit in midair.

• Cho Chang pointed out Marcus carrying two dinners and told Hermione that Penelope was likely staying in Moriarty’s private dormitory.
• Penelope told Moriarty she had loved him since they first met and described learning Muggle dance to please him; Violet watched nearby.
• Gryffindor and Slytherin began Quidditch tryouts, and Ron told the first-years that Moriarty had helped make it possible for them to try out.
• Draco attacked Ron with Dragon’s Breath after Ron insulted him, but William stopped the confrontation before Wood began the tryouts.
• William deliberately let Ron take part and secretly redirected a Bludger toward him, which smashed into Ron’s chest.

After Ron was badly injured by an enchanted Bludger, William treated him and investigated the incident while Draco and Harry tried out for rival Quidditch teams. Harry became a Slytherin reserve Chaser, and the chapter ended with Moriarty and Dumbledore watching the peaceful scene from the Astronomy Tower.

• Wood caught Ron with a Levitation Charm after an enchanted Bludger struck him, and George carried the unconscious Ron toward the Hospital Wing.
• William stopped Ron's bleeding with Dittany, accused someone of enchanting the Bludger, and said he would report the incident to Dumbledore.
• Draco impressed Wood with his flying and earned a place as Gryffindor's new Chaser.
• Jericho called Harry to try out for Slytherin, and Draco reluctantly explained the rules and gave him flying advice.
• Harry impressed the teams on the Nimbus 1990S and became a reserve Chaser for Slytherin.
• Moriarty and Dumbledore watched the Quidditch players from the Astronomy Tower.

Moriarty told Dumbledore he had a way to strike Voldemort and began bringing that plan into action after Voldemort targeted students. He revealed Ravenclaw’s Diadem as Voldemort’s fifth soul fragment and confronted the young Tom Riddle inside the diary, leaving Tom to consider whether he wanted to be resurrected.

• Moriarty told Dumbledore that he would reveal someone he had kept in reserve because Voldemort had begun harming students.
• Moriarty assured Percy that Ron would be helped, said the Egyptian princess’s earrings needed to be handed over, and asked Percy to have his mother send them to Dumbledore.
• Moriarty sent Narcissa to find the key to Bellatrix Lestrange’s vault and asked the Ventrue Queen to search Marvolo Gaunt’s Shack for a ring.
• Moriarty placed Ravenclaw’s Diadem beside Tom Riddle’s diary and discovered that the diadem contained Voldemort’s fifth soul fragment.
• Moriarty flooded the diary’s world to punish Tom, then told him Voldemort had returned by possessing someone and asked whether he wanted to be resurrected.

Moriarty forced Tom to fight and absorb Voldemort’s fifth soul fragment in a spiritual space, then arranged for Tom to oppose Voldemort’s main soul. Tom woke imprisoned in a ball of water, with Moriarty warning that it would serve as his body until he recovered his own.

• Tom agreed to Moriarty’s demands after Moriarty threatened to destroy the diary, and Moriarty sent him into a spiritual space with Voldemort’s fifth soul fragment.
• Tom defeated and devoured the fifth soul fragment, earning a chance at resurrection and agreeing to defeat Voldemort’s main soul.
• Tom raged about Voldemort’s choices, and Moriarty revealed that he had secretly placed a spell in Tom that would make him explode if he disobeyed.
• Moriarty caused Tom to lose consciousness, then kept him inside a ball of water and told him it would be his body until he recovered his own.

Moriarty helped Tom reshape himself into a water man and sent him to confront Voldemort, who had gone to steal the Philosopher's Stone. Harry and Draco followed a hissing sound to the Alchemy Classroom, where Tom heard that Voldemort had been badly injured and rushed inside.

• Moriarty taught Tom to shape the water around him, and Tom formed a face before gradually building a water body over the following week.
• Moriarty warned Tom not to kill Voldemort's host or devour the soul fragment in Harry, then sent him out after Voldemort.
• Harry and Draco sneaked into the Library to copy spells, then followed a hissing sound toward the Alchemy Classroom.
• Harry recognized the hissing as Parseltongue, and he and Draco found the classroom doors open as a fight sounded inside.
• Tom followed Voldemort to the classroom and, hearing that Voldemort had been severely injured, rushed in.

Voldemort escaped Nicolas Flamel’s Alchemy Classroom with an injured leg, while Lilith rescued Harry and Draco from the corridor. The next morning, Harry and Draco recognized that Professor Snape was limping, raising their suspicions about the intruder’s identity.

• William fought off the animated Desk Soldiers, but Nicolas Flamel trapped Voldemort with a gate protected by a Rebound Curse, injuring his left calf as he escaped.
• Tom slipped away after hearing Perenelle Flamel call for Nicolas, while Voldemort fled through the underground corridor and cleaned up his bloodstains.
• An unseen person used the Disillusionment Charm to hide Harry and Draco from Voldemort, and Lilith later revealed herself and escorted them back.
• Harry and Draco told Moriarty they had seen the intruder limping and bleeding, then hurried to their first Potions class.
• Professor Snape arrived late, limping, and Harry and Draco realized his injury matched the intruder’s.

Harry and Draco discussed the mysterious intruder, while Ron’s clashes with Snape and other students drew attention across Hogwarts. Harry grew suspicious of Snape and accompanied Ron to Professor William’s office to borrow Alchemy books, unaware that Ron was hoping for a reward.

• Snape caught Harry and Draco whispering in Potions and ordered Pansy to switch seats with Harry.
• Zabini blamed Ron’s fall and bruised forehead on Ron’s supposed bad luck, and Snape took five points from Gryffindor when Ron complained.
• Rumors spread that a murderer had broken into the Alchemy Classroom, prompting Dumbledore to tell students to stay alert and avoid going places alone.
• Harry told Ron that he suspected Snape had killed Sirius and broken into the Alchemy Classroom, and Ron eagerly agreed that Snape was guilty.
• Hermione and Hannah confronted Ron for shouting in the Library, and Madam Pince sent him out after Hannah reported him.
• Harry offered to accompany Ron to Professor William’s office to explain why he had not borrowed the requested books, and Ron said they were about Alchemy.

Moriarty prepared his allies for a battle against Voldemort while Voldemort used William to bewitch Ron and draw Harry into a mission. The chapter ended with Peter Pettigrew revealing his plan to resurrect Voldemort using Sirius's wand.

• Tom reported that Voldemort had met with Harry, and Moriarty predicted Voldemort would act that night to control Harry and other students.
• Moriarty gathered Marcus, Jericho, Soldaya, Percy, and Lilith in the Room of Requirement and assigned them to an eight-person squad for the planned battle.
• Voldemort, disguised as William, returned Scabbers to Ron and persuaded Ron to bring Harry to the Alchemy Classroom that night.
• Harry praised William and grew closer to Ron, while Draco remained angry at seeing them together and Neville reported their behavior to Moriarty.
• Scabbers transformed into Peter Pettigrew, who knelt before William with Sirius's wand and vowed to use it to resurrect Voldemort.

Harry and Ron entered the Alchemy Classroom to find a stone for Professor William, unaware that William was Voldemort in disguise and had followed them. When Voldemort took the stone, it burned him and revealed his possession; Moriarty and his allies intervened, captured Voldemort in a sphere of water, and left his fate to Tom.

• Harry and Ron sneaked into the Alchemy Classroom to search for the stone, while William and Scabbers secretly followed them.
• Ron found a stone and handed it to William, who revealed himself as Voldemort when the stone burned his hand and exposed his possessed body.
• Moriarty and his companions entered the classroom, and a leopard cat caught Scabbers as they confronted Voldemort.
• Voldemort cast Imperius Curses on Harry and Ron, but Moriarty restrained them with a huge snake and blocked the curses.
• Tonks and the others attacked Voldemort until Moriarty's water elemental magic let Tom trap him inside a sphere of water.

After Tom defeated Voldemort and gained strength, Moriarty prepared to send him on a dangerous mission while the Ministry dealt with Peter Pettigrew’s capture. Narcissa sent Moriarty a recorded confession of her love, but William remained unconscious as Fudge tried to distance the Ministry from Voldemort’s crimes.

• Moriarty reassured Percy that Ron and Harry would recover from the Imperius Curse, while Lilith warned Percy to keep Ron in line.
• Tom emerged victorious over Voldemort, and Moriarty noted that Tom’s soul had recovered to the strength of an ordinary wizard.
• News spread that Peter Pettigrew had controlled Professor William, cursed the Bludger, and confessed to betraying the Potters and killing Sirius Black.
• Narcissa sent Moriarty a Howler containing a recorded message in which she confessed that she loved and missed him.
• Moriarty brought the unconscious William to the Great Hall, where Leon anxiously took charge of him.
• Fudge blamed Peter Pettigrew for the crimes and pleaded with Moriarty to agree that Voldemort had not been involved.

After Voldemort’s defeat, Dumbledore appointed Remus Lupin to replace Professor William, while Harry recovered and sought answers about his father and Ron’s strange behavior. Moriarty told Harry to watch and direct Ron, revealing that Ron was Voldemort’s eighth Horcrux.

• Moriarty confirmed to Fudge that Dumbledore had told the truth, and Fudge sent Peter Pettigrew to Azkaban while offering Tonks an award and an Auror position.
• Dumbledore chose Remus Lupin to replace Professor William, while Snape insisted he could keep teaching despite his injured leg.
• Harry and Ron left the hospital after three days, and Harry heard that Lupin had been close to James Potter and Sirius Black.
• Neville told Harry that Moriarty and Marcus had gone to Hogsmeade, so Harry waited until evening to ask Moriarty about his suspicions and his father’s friends.
• Harry told Moriarty that Ron had behaved strangely and that he had heard hissing; Marcus became furious when Harry revealed he had suspected Snape.
• Moriarty secretly instructed Harry in Serpent Tongue to get close to Ron, watch him, and direct him, then revealed to Lilith that Ron was Voldemort’s eighth Horcrux.

Moriarty revealed that Voldemort had hidden his eighth soul fragment inside Ron, whose jealousy and resentment grew as the fragment influenced him. Dumbledore also learned that Ron’s stolen earring had cursed the entire Weasley family, while Ron’s punishment and worsening behavior continued; the chapter ended as he watched a Slytherin versus Ravenclaw Quidditch match.

• Moriarty explained that Voldemort had placed a soul fragment inside Ron after killing Sirius, and his friends agreed to watch Ron closely.
• Ron fought with Draco, became estranged from his roommates, and grew jealous of Moriarty and Harry as Voldemort’s fragment encouraged his resentment.
• Lupin reported Ron’s change in behavior to Dumbledore, who revealed that the Egyptian earring’s curse affected the entire Weasley family and would take effect in about a hundred years.
• Dumbledore kept the curse secret from the Weasleys and approved Ron’s punishment of lost points, labor, and a week of detention.
• Voldemort’s fragment influenced Ron to agree that Centaurs should be ruled, and Ron then joined Fred and George to watch the Slytherin versus Ravenclaw Quidditch match.