Chapter Summaries

Sean kept Snape’s old Half-Blood Prince textbook and worked with Blaise through the night to brew potions. Meanwhile, Andy rejected Robbins’s offer to secure his inheritance rights, ending their relationship as Robbins threatened him.

• Sean recognized the old textbook as Snape’s and secretly kept it, while Blaise distanced himself from it.
• Sean and Blaise used the Room of Requirement to brew potions through the night, pushing Sean to exhaustion.
• Andy went to the Great Hall to meet potion customers after spending a sleepless night.
• Robbins offered to cover Andy’s potion debts if Andy gave up his Morgan family inheritance rights.
• Andy accused Robbins of conspiring with Dorian and rejected his offer, and Robbins warned him he would regret it.

Andy faced rumors that he had spent his customers’ advance payments and could not deliver their potions, and the students turned on him when noon arrived without a delivery. Sean rescued Andy from the crowd and announced that he had brought the potions, then confronted the students.

• Students told Andy that rumors claimed he had spent their advance payments and could not provide their potions.
• Andy reassured his customers that he would deliver the potions before noon, while Robbins waited for his business to collapse.
• When noon arrived without the potions, customers demanded refunds and crowded around Andy.
• One student grabbed Andy, and the crowd began punching him as he tried to explain.
• Sean caught a punch, pulled Andy out of the crowd, and forced a student to his knees before asking whether they still wanted the potions he had brought.

Sean and Blaise helped Andy distribute the potions and clear his name, then Sean followed Robbins to find Dorian. The chapter ended with Sean punching Dorian in the nose.

• Sean revealed that Andy's potions were ready, and Blaise laid them out for the crowd.
• Andy distributed the potions and accepted apologies from customers who had wrongly accused him.
• Andy thanked Sean and Blaise, and Sean agreed to repay the borrowed Potion Ingredients within three days.
• Andy asked Sean not to pursue Robbins, and Sean promised while deciding to confront the person who had broken the Rules.
• Sean followed Robbins to the Quidditch Pitch, where Robbins told Dorian that their plan had failed.
• Dorian approached Sean, Blaise, and Andy, and Sean punched him in the nose.

Sean fought Dorian at the Quidditch Pitch and defeated him, then gained a new Transfiguration ability from the duel. After returning to the Slytherin Common Room, Sean was summoned to Professor Snape’s office.

• Dorian accused Sean of attacking him, and Sean admitted he had come to fight before casting a spell at him.
• Sean and Dorian traded spells and Transfiguration, until iron spikes pierced Dorian and sent him tumbling from the stands.
• Dorian challenged Sean with a Stunning Spell, but Sean’s Disarming Charm overpowered it and knocked Dorian unconscious on the Quidditch Pitch.
• Sean tossed Dorian a healing potion, then left with Blaise and Andy and gained Transfiguration LV2 from the duel.
• A third-year Slytherin told Sean that Professor Snape wanted to see him in his office.

After Sean received points deductions and detention from Snape for hitting Dorian, he focused on earning the points back while Andy began competing with Dorian in business. Sean completed his four detentions and noticed Halloween decorations in the Great Hall, signaling that it was time to begin his plan for the Deathday Party.

• Sean accepted Snape's punishment of twenty points deducted and four weeks of Sunday detention processing Potion Ingredients.
• Andy vowed to take on Dorian, while Blaise offered to fund a business venture with Andy and Sean if Andy lost his inheritance rights.
• During October, Sean worked to regain the points and attended two Slytherin Brotherhood Reserve Organization gatherings, while Andy competed with Dorian and gradually gained the upper hand.
• Sean finished processing Unicorn Horn during his final detention, and Snape told him he no longer needed to come in.
• Sean saw Halloween decorations in the Great Hall and realized it was time to begin his Deathday Party plan.

Sean intervened when Ginny, under the Diary’s influence, wrote a message declaring that the Chamber of Secrets had been opened. He took the Diary and brought it back to his room, where he discovered that defeating its soul fragment could trigger his third Magic Awakening.

• Sean left Blaise to notify Andy and Janson, then used the Disillusionment Charm to slip away from the Slytherin Common Room.
• Ginny woke in a disused bathroom and, persuaded by Riddle’s voice, took the Diary and believed he was her best friend.
• The Diary-controlled Ginny found the petrified Mrs. Norris and wrote a warning on the wall about the Chamber of Secrets.
• Sean stunned Ginny, took the Diary, and left her safely in a shadowed corner before returning to the Slytherin Common Room.
• Sean discovered that winning a duel against the Diary’s soul fragment could begin his third Magic Awakening, but declined to extract it immediately.
• Sean opened the Diary and wrote, “Hello, Tom!”

Sean negotiated with the Diary, which revealed itself as Voldemort and offered to teach him magic in exchange for conditions. Sean secured a one-month deal to learn from it and planned to keep it isolated in the Room of Requirement.

• Sean pretended to be Albus Dumbledore, then claimed to be Draco Malfoy, and the Diary identified itself as Voldemort.
• The Diary offered Sean knowledge and magic to tempt him with power and authority, but Sean demanded proof before discussing its conditions.
• Sean threatened to put the Diary in a boys' bathroom toilet until it agreed to answer all his questions and share what it knew for one month.
• Sean shut the Diary, put it in his pocket, and decided to store it in a private room in the Room of Requirement.

Sean continued verifying the Diary’s magical knowledge while Hermione prompted Professor Binns to explain the Chamber of Secrets. After Harry faced renewed rumors that he was Slytherin’s heir, Sean advised him to respond with confidence and become stronger.

• Sean studied advanced Transfiguration and carefully checked the Diary’s answers with other sources before pursuing them.
• Hermione asked Professor Binns about the Chamber of Secrets, and he explained Hogwarts’s origins and the legend to an attentive class.
• Sean suspected someone in Slytherin had spread the rumor that Harry was the heir after Mrs. Norris was petrified.
• Colin pressed Harry about the rumor and tried to photograph him, so Harry hurried away with Ron and Hermione.
• Sean reassured Harry that public scrutiny and slander were inevitable and advised him to deny false accusations firmly.
• Harry thanked Sean and said he would think carefully about his advice.

Sean observed Harry cooperating with Lockhart while preparing a second Potions paper and studying Transfiguration for a future publication. The chapter ended with Sean continuing his private lessons on advanced Transfiguration through the Diary in a secure Room of Requirement.

• Lockhart was delighted when Harry agreed to reenact a scene from one of his books, while Blaise and Sean speculated that Harry wanted something from him.
• Sean asked Blaise about his girlfriend, and Blaise said their relationship was going well despite spending less time together in the library.
• Sean planned a second Potions paper and considered Professor McGonagall's encouragement to pursue Transfiguration research for "Animagus."
• Sean overheard Harry and the others asking Lockhart for permission to enter the Restricted Section.
• Sean entered the room that only he could access when alone and studied third-stage Transfiguration with the Diary.

Sean attended an impromptu meeting of the Slytherin Brotherhood Reserve Organization, where Barrett Cotton claimed that Voldemort was Slytherin’s heir and was using the Basilisk to purge Muggle-born students and Squibs. The meeting ended with Barrett openly advocating the deaths of those he considered impure.

• Sean left Blaise after Samuel and Ilina summoned him to an impromptu meeting of the Slytherin Brotherhood Reserve Organization.
• Barrett Cotton chaired the meeting and said he had concluded that the Basilisk had petrified Mrs. Norris.
• Barrett claimed that Voldemort, not Harry, was Slytherin’s heir and was at Hogwarts directing the Basilisk.
• Samuel warned Barrett against voicing those beliefs, while Oliver challenged Samuel and implied that Sean might be frightened.
• Barrett declared that Muggle-born students and Squibs should be killed by the Basilisk.

Sean decided Barrett was too dangerous to leave unchecked after hearing him advocate purging Hogwarts, but he avoided using a curse again. He borrowed Harry’s Invisibility Cloak so he could secretly follow Barrett and discover what he intended to do.

• Barrett proposed that the Slytherins find and support Slytherin’s heir, release the Basilisk, and purge Hogwarts, but the meeting rejected his plan.
• Sean noticed Barrett showed no anger when the vote failed and wondered whether his earlier fanaticism had been an act.
• Sean left the Slytherin Common Room and asked Harry to lend him the Invisibility Cloak.
• Harry gave Sean the cloak, and Sean planned to use it to follow Barrett without being detected.

Sean followed Barrett to the boathouse under his Invisibility Cloak and overheard a group of Slytherins plotting to purge students they considered unworthy, including Sean. After the others left, Barrett asked Dickie whether Mr. Bulstrode would keep his promise.

• Sean checked the Invisibility Cloak’s prompt and learned it was a Deathly Hallow that contained the Dominion of Death.
• Sean followed Barrett and another student from the Slytherin Common Room to the boathouse, where three more Slytherins awaited them.
• Barrett and the others discussed opposing the Slytherin Brotherhood and preparing for the Dark Lord’s return.
• Barrett named Andy Morgan, Liz Bass, and Sean Bulstrode as targets for their planned purge.
• Barrett dismissed the others, checked the boathouse for eavesdroppers, and asked Dickie what Mr. Bulstrode had promised.

Sean uncovered that his uncle Borel had arranged the plot against him, while Harry’s Quidditch match ended with Harry breaking his arm and violently resisting Lockhart and Colin. The chapter left Harry facing the stunned crowd after destroying Colin’s camera with Lockhart’s Wand.

• Sean realized Borel had used Barrett, Dickie, and Voldemort supporters to orchestrate a plot against him, then returned to Hogwarts.
• Sean watched Slytherin defeat Gryffindor in the first Quidditch match of the season as Harry caught the Snitch despite being struck by a Bludger.
• Lockhart tried to heal Harry’s broken arm, but Harry refused and snatched Lockhart’s Wand from him.
• Colin raised his camera to photograph Harry, and Harry blasted it apart with Lockhart’s Wand.

After Harry broke Colin's camera in anger, Sean visited him in the Hospital Wing and advised him to replace it while explaining his feelings in a letter. Harry later sent Colin a new camera, and Colin thanked him and became his devoted admirer.

• Harry left the Quidditch Pitch for the Hospital Wing after breaking Colin's camera, while Sean returned to the castle with Blaise.
• Sean visited Harry and heard him explain that he regretted losing his temper with Colin, who had repeatedly photographed him despite being asked to stop.
• Sean suggested Harry send Colin a new camera with a letter describing his feelings, and Harry agreed.
• After Gryffindor won its match against Ravenclaw, Colin received the camera and letter from Harry and thanked him.
• Dobby emerged from a shadow outside the Hospital Wing and slipped into Harry's ward.

Sean used the Diary to improve his magic and decided to carry out their agreement by opening the Chamber of Secrets. Disguised as Voldemort in Black Smoke, he frightened Barrett into proving his loyalty by killing four Slytherin students.

• Sean agreed to act according to his agreement with the Diary in the next few days.
• Barrett spotted a figure surrounded by Black Smoke leaving the Slytherin Common Room and followed it to an abandoned dungeon room.
• Sean trapped Barrett and appeared before him as Voldemort, whom Barrett recognized as the Dark Lord.
• Sean accused Barrett of using Voldemort's return as a pretext for his own goals, and Barrett fell to his knees and begged for forgiveness.
• Sean ordered Barrett to kill three half-bloods and a son of a squib, then said he would return in a week to check that they were gone.

Sean prepared a trap for Barrett’s group, who planned to attack him and two other Slytherins in Hogsmeade on Saturday. He agreed to get Harry, Ron, and Hermione ingredients for Polyjuice Potion, leaving them able to brew it by Saturday.

• Sean decided to draw Barrett into a trap and planned to pass the Diary to Millicent, while Mallow considered reducing the number of people he controlled.
• Barrett told Dickie and the others they would follow their targets to Hogsmeade on Saturday and kill them, gaining their support by warning them about punishment.
• Harry, Ron, and Hermione caught up with Sean and asked him to obtain Unicorn Horn and African Tree Snake Skin for their potion plans.
• Sean agreed to give them the ingredients on Saturday night, without asking what they needed them for.

Millicent, isolated in the Slytherin Common Room and consumed by resentment, began writing in Tom Riddle’s Diary and was quickly lured by its promises of power. Sean watched her fall under the Diary’s influence, intending to use her to open the Chamber of Secrets, while the Diary planned its rebirth and revenge on Sean.

• Millicent saw that Malfoy and the other Slytherins ignored her, and she suppressed her anger while hoping her father would soon deal with Sean.
• Millicent found the Old Diary bearing the name Tom Riddle and wrote that she wanted everyone who looked down on her to be punished.
• Tom Riddle’s Diary promised Millicent power and revenge, and she eagerly asked how she could cooperate with it.
• Sean left Millicent’s room after secretly watching her converse with the Diary, planning to make her its slave and the culprit who opened the Chamber of Secrets.
• The Diary realized Sean had tricked it and resolved to use Millicent to carry out its plan before taking revenge on him.

Sean found Luna Lovegood petrified after the Basilisk attack and realized she had seen its gaze reflected in a suit of armor. Dumbledore arranged for Luna to receive treatment and ordered the Houses to return to their Common Rooms while Professor Sprout prepared the Mandrake potion.

• Sean heard Peeves announce that a first-year Ravenclaw girl was dead and ran toward the scene.
• Sean found Harry and Ron beside Luna and discovered that she was petrified, not dead, after seeing the Basilisk in an armor’s reflection.
• Sean suspected Millicent had caused the attack using the Diary, noting her excitement as she watched the gathered crowd.
• Dumbledore thanked Sean, ordered the Heads of House to take their students back to their Common Rooms, and arranged for Luna to be taken to Poppy.
• Dumbledore told Professor Sprout to prepare the Mandrake potion, overruling Snape’s offer to handle it.

After the Petrification incident, Snape questioned Sean about being out at night and discovered how many potions Sean had brewed. Impressed by Sean’s skill, Snape asked about his research paper, which focused on modifying the Mind Recovery Potion.

• Snape led Sean and the other Slytherins back to the dungeons after the incident.
• Snape summoned Sean to his office and asked why he had been wandering outside at night.
• Sean explained that he had been brewing potions with Andy and handed Snape the bag containing them.
• Snape examined the potions and realized Sean had deliberately controlled their quality, showing mastery of the brewing process.
• Snape asked about Sean’s paper, and Sean said he was trying to extend the Mind Recovery Potion’s effects and make it easier to brew.

Sean used a double-cross to lure Barrett and his Slytherin allies into the woods, where Mallow and a force of Dark Wizards surrounded them. Barrett’s attempt to escape was stopped, and Mallow declared that they served the Dark Lord.

• Sean found Kulkan shaken by the Basilisk’s attack and calmed it before leaving to study the next day.
• Sean and Andy went to Hogsmeade, where Sean drugged Andy and had Mallow use Polyjuice Potion to take Andy’s appearance.
• Sean and Mallow left Hogsmeade for the woods, drawing Barrett and four others into following them.
• Mallow revealed himself, and Dark Wizards under his control surrounded Barrett’s group.
• Barrett tried to Apparate away, but Mallow struck him with a spell and proclaimed their allegiance to the Dark Lord.