Chapter Summaries

Harley used her Patronus to investigate the attack on Filch's office and discovered that a short man had struck Filch and searched a cabinet. She suspected the man had been looking for the Marauder's Map.

• Harley tested how her consciousness and Mythical Creature Form could empower her Patronus, then glided toward Filch's office.
• Harley found Filch's office ransacked and used her magic to replay what had happened there.
• Harley saw a rat transform into a short man, who hit Filch with a chair and searched the cabinets.
• Harley identified the first cabinet the man searched as the one labeled for highly dangerous confiscated items and recalled that it had held the Marauder's Map.

Harley searched Filch’s office and the corridor outside Snape’s office, concluding that Peter Pettigrew had acquired a wand and had recently left Snape’s office with materials. Dumbledore caught her using her Patronus to carry her consciousness, and their conversation ended with his warning that she should be careful if she tried to become an Animagus.

• Harley found a correspondence-course letter in Filch’s office and realized that Peter Pettigrew had obtained a wand through a Squib spell course.
• Harley used reversion near Snape’s office and learned that the short man had sneaked out carrying a pile of materials.
• Dumbledore appeared with Fawkes and caught Harley taking a stroll through her Patronus.
• Harley claimed she was searching for Sirius Black to avenge her parents, and she argued that blood vengeance was protected by Europe’s oldest code.
• Dumbledore praised Harley’s unusual Patronus and warned her to be careful if she wanted to become an Animagus.

Harley learned more about Sirius and Peter Pettigrew, then decided to explore the Forbidden Forest that night. Sirius grew angry after hearing that Peter had stolen Potion ingredients and that Snape had reported Lupin to Dumbledore.

• Dumbledore explained animal-shaped Patronuses to Harley and refused to reveal whether he had an Animagus form.
• Lupin told Sirius that Peter had tried to steal the Marauder's Map and Potion ingredients, and Sirius realized Peter might use a Potion to erase his tracks from the map.
• Sirius learned that Snape had reported Lupin to Dumbledore and threatened to take Snape with him after he killed Peter.
• On Halloween, McGonagall reprimanded Hannah for claiming Sirius could transform into a flowering bush and assigned her detention memorizing Animagus facts.
• Harley watched Sirius and Lupin meet, then decided to explore the Forbidden Forest that night.
• Harley climbed out of the dormitory window, passed Hagrid's Hut without disturbing Sirius, and entered the Forbidden Forest.

Harley explored the Forbidden Forest at night to map Fantastic Beasts and locate future ingredient sources. After observing the lake’s creatures, she encountered a group of Acromantulas and prepared to collect their venom.

• Harley flew into the Forbidden Forest and watched predators and Fantastic Beasts gather at a lake.
• Harley memorized where the herds appeared so she could use their habits to find magical plants.
• A Thestral that had pulled Harley’s carriage greeted her, while the Unicorns kept their distance and left the lake.
• Harley followed her Spirituality’s warning of a discovery and landed near a group of Acromantulas.
• The Acromantulas attacked Harley with webs, and Harley vanished as she announced she would collect their venom.

Harley fought a colony of Acromantulas, using them to test how she could combine her Demoness abilities with magic before freezing them and harvesting valuable materials. After spending nearly three hours collecting the spoils, she chose to walk back and look for another adventure.

• Harley killed the foremost Acromantula with a dagger and studied its skull while taunting the creatures around her.
• Harley battled the Acromantulas with spells, Black Flame, frost, and Spider Silk as she tested her combat methods and recorded their properties.
• More than twenty Acromantulas died, and the cleverest ones fled while Harley drew the others into a clearing.
• Harley unleashed a borrowed Disease Aura that froze the remaining Acromantulas, then broke free of the ice that trapped her.
• Harley stored the frozen bodies and harvested venom, eyes, and silk glands from the other corpses.
• Harley finished collecting materials after nearly three hours and walked on, deciding to take another day off and seek an adventure.

Harley’s attack on the Acromantulas alarmed Aragog, who planned to warn Hagrid and prepare an escape route for his colony. In the Forbidden Forest, Harley encountered centaurs who argued over the meaning of the stars’ signs about her.

• Acromantulas returned to their lair with the bodies of their kin and reported that a human girl had attacked them.
• Aragog worried that powerful wizards might hunt his colony, so he decided to tell Hagrid and send scouts to look for a place to flee.
• Harley encountered Bane, who raised his bow and ordered her to leave what he called centaur territory.
• Firenze intervened to protect Harley, whom he called a foal, while Bane insisted she was a sign of Mars.
• Ronan and Firenze warned that the planets’ signs were uncertain, and Bane left after threatening them.

After the centaurs argued over the stars’ meaning, Harley researched astrology but could not determine what their predictions meant for her. Slytherin postponed its Quidditch match against Gryffindor, forcing Hufflepuff and Gryffindor to prepare for a new opening matchup.

• Firenze apologized to Harley for Bane’s rudeness and told her that Mars, Jupiter, and Pluto were shining; Harley hurried back to the castle.
• Harley slept until noon, then read about Mars, Jupiter, and Pluto in the library and wondered whether the stars foretold disaster, opportunity, or death and rebirth for her.
• Slytherin requested a postponement of its Quidditch match, claiming Malfoy had not recovered from his arm injury, and Madam Hooch approved it.
• Madam Hooch replaced Gryffindor’s opponent with Hufflepuff, surprising the unprepared Badgers and frustrating Wood.
• Cedric began intensive Hufflepuff training in heavy rain, while both teams prepared for the match and blamed Slytherin and Malfoy.

Professor Snape replaced Professor Lupin for Defense Against the Dark Arts, taught the class about werewolves, and assigned a long essay. Hermione realized Lupin matched the textbook’s description of a werewolf, but Harley revealed she already knew and trusted that Dumbledore had made arrangements to keep him safe.

• Harley arrived as class began and found Professor Snape filling in for Professor Lupin, who was unwell.
• Snape extended Harley’s detention, criticized Lupin’s teaching, and gave the students a lesson on werewolves and an essay assignment.
• After class, Hermione compared Lupin with the textbook’s werewolf traits and asked Harley if she had noticed anything strange about him.
• Harley said she had known Lupin was a werewolf since the train ride and pointed out that Dumbledore had hired him and Snape had been brewing Wolfsbane Potion for him.
• Hermione began to understand that Lupin could be safe if he drank the potion.

Harley helped Hermione accept Professor Lupin, then led Gryffindor against Hufflepuff in a stormy Quidditch match. Harley dominated the game, and Hufflepuff struggled to advance as the score gap widened.

• Harley explained that Dumbledore trusted Lupin and Snape supplied him with Wolfsbane Potion, convincing Hermione not to discriminate against him.
• Gryffindor and Hufflepuff began the Quidditch match in a storm after Slytherin swapped match dates because their Seeker had an arm injury.
• Lee mocked Slytherin's decision over the commentary, drawing laughter from the spectators except the Slytherins.
• Harley scored a long-range goal within thirty-seven seconds, catching Hufflepuff Keeper Jadrow Moncart off guard.
• Gryffindor used its storm training and teamwork to dominate the match, while Harley scored 110 points in twenty-five minutes.
• Hufflepuff repeatedly lost the Quaffle to Harley and could not get past halfway, leaving the Badgers furious with Slytherin and Malfoy.

Harley scored repeatedly for Gryffindor before hundreds of Dementors descended on the Quidditch match. She drove them back with her Patronus, and the chapter ended with Dumbledore confronting them in fury.

• Harley scored her fourteenth goal as Gryffindor focused on scoring while Katie guarded Cedric.
• Cedric and Katie spotted the Golden Snitch, then discovered Dementors gathering in the storm clouds and fled toward the ground.
• Harley summoned a silver Medusa Patronus and attacked the Dementor leader, forcing the others back.
• The Heads of House conjured Patronuses around the pitch, while Snape did not produce one.
• Two phoenixes rose near the stands as Dumbledore declared, “I warned you!”

The professors and Fawkes drove the Dementors from the Quidditch Pitch, and the match was called off before anyone caught the Golden Snitch. Harley returned to the Gryffindor common room to a hero’s welcome, while Oliver insisted Gryffindor had not yet won.

• The Heads of House and Fawkes attacked the Dementors until they fled, with Fawkes burning more than ten of them.
• Lupin led Sirius away in his dog form and warned him to stay quiet so he could continue searching for Peter.
• McGonagall praised Harley, called off the match, and sent the players back to their dormitories.
• Ginny told the returning players that the Gryffindor password had changed to “Triumph!” and congratulated Harley on her performance.
• Fred and George welcomed Harley into the common room as the Lion Queen, and Hermione and the Gryffindors cheered her.

Fudge learned that Dementors had attacked Harley at a Quidditch match, while Hogwarts students celebrated her and the Heads of House driving them off. Harley planned her busy week, and Fred and George showed her their joke products as they renewed their request for investment.

• Fudge received an Auror's report about the Dementors' riot and hurried to Hogwarts after Dumbledore assured him that only Harley had been targeted and no students were hurt.
• Hogwarts students discussed the Patronus Charm, and Professor Lupin resumed teaching Defense Against the Dark Arts with a lesson on Hinkypunks.
• Harley planned her upcoming studies and activities, then learned that Gryffindor had been declared the winner of its match against Hufflepuff.
• Wood scheduled another Sunday Quidditch practice to celebrate Gryffindor's victory.
• Fred and George showed Harley their finished joke products, and she agreed to invest in their business.

Harley and Hermione visited Hogsmeade before Christmas, where Harley met the Weasley Twins at the Hog's Head to sign a contract. The chapter ended with Harley entering the filthy pub and ordering Mead while Hermione followed her inside.

• Harley noticed the school's Christmas decorations and questioned the crosses Professor Babbling had put on her classroom's coffins.
• Hermione fell asleep in the Thestral carriage after explaining that her twelve classes and Time-Turner use were exhausting her, and she considered dropping Divination and Muggle Studies.
• Harley and Hermione shopped in Hogsmeade, where Hermione bought Peppermint Toads for her parents.
• Harley recognized what seemed to be Professor Dumbledore's handwriting on a sign advertising the Hog's Head's history.
• Harley and Hermione entered the Hog's Head, and Harley ordered Mead while rejecting the owner's dirty glasses.

Harley met Fred and George at the Hog’s Head and invested 1,500 Galleons for a thirty-percent share in their future Joke Shop. After the deal, the twins introduced Hermione to Mundungus Fletcher and revealed that he worked for Professor Dumbledore.

• Harley recognized Fred and George despite their hoods, and they showed her their proposed investment contract.
• Harley raised her investment from 500 to 1,500 Galleons while keeping a thirty-percent share and the right to examine the twins’ product-making methods.
• Fred and George signed duplicate contracts, and George pocketed Harley’s money.
• George identified the stout wizard as Mundungus Fletcher, a shady dealer whom the twins needed to source materials for their Joke Shop.
• George told Hermione that Mundungus worked for Professor Dumbledore.

Harley and the Weasley Twins bought contraband Potion ingredients from Mundungus, and Harley arranged a secret way to contact him for future trades. After he left, the twins explained to Hermione why Dumbledore had employed a criminal during the wizarding war, and Harley stayed behind to buy spirits.

• Harley recognized Mundungus from a photograph with Dumbledore and Lupin, then watched Fred and George buy contraband ingredients from him for twenty-seven Galleons.
• Harley offered to trade with Mundungus and gave him enchanted hair paste that let them exchange messages through mirrors.
• Harley told Fred that her magic was a Potter family inheritance, and the group celebrated the twins' contract over Mead and Butterbeer.
• Hermione asked why Dumbledore had worked with Mundungus, and Fred and George explained that Dumbledore needed help investigating Dark wizards during the war.
• Fred and George left to test their ideas, while Harley bought spirits and haggled down the owner's price.

Harley prepared a ritual to locate the traitor connected to her parents’ deaths, but Hogwarts interfered with her search. She finally saw a rubbish-filled room in the castle and set out with Hermione to ask the House-elves where it was.

• Harley recognized the Hog’s Head owner as Aberforth Dumbledore and returned to Hogwarts with Hermione.
• Harley told Hermione she planned to catch a traitor linked to her parents’ deaths and uncover the truth herself.
• Harley and Hermione found the Room of Requirement unavailable, so Harley performed her locating ritual in their dormitory.
• Harley bypassed the interference with Sequence 4 power and saw a rubbish-filled room containing a Quintaped specimen, a battered cabinet, and a half-body statue wearing a Diadem.
• Harley took the Magic Mirror and left with Hermione to ask the House-elves about the room.

Harley and Hermione found Peter Pettigrew hiding in the Room of Requirement and confronted him. Harley restrained him with her mirror and magic, and Hermione’s Stunning Spell knocked him unconscious.

• Harley and Hermione asked Bitty to identify a room shown in Harley’s mirror, and Bitty recognized it as the Room of Requirement’s hiding place.
• Harley and Hermione entered the room and used the Magic Mirror to locate Peter Pettigrew.
• Harley learned that Peter had hidden as a rat with the Weasley family for twelve years before taking refuge at Hogwarts.
• Harley restricted Peter’s ability to transform or focus, while Hermione fired Stunning Spells at him.
• Harley bound Peter with Spider Silk, and Hermione’s spell struck him unconscious before Harley greeted him as her uncle.

Harley captured Peter Pettigrew and brought him to Hagrid's Hut, where she revealed Sirius Black's identity and explained how she had uncovered the truth. The group accepted that Sirius might be innocent, but Harley refused to let him kill Peter, insisting that she would take revenge herself.

• Harley bound Peter Pettigrew, agreed to teach Hermione how to fight, and summoned Dumbledore to discuss the capture.
• Dumbledore gathered McGonagall and Lupin, then brought them with Harley and Hermione to Hagrid's Hut.
• Sirius recognized Peter and lunged at him, and Harley revealed that the black dog was her godfather, Sirius Black.
• Harley described how she had investigated Sirius, Lupin, and Peter, while Lupin admitted his past failures and said he believed Sirius after using Legilimency.
• Sirius said he was proud of Harley and asked to kill Peter, but Harley refused and said she would make Peter pay herself.

Dumbledore questioned Sirius and Peter Pettigrew under Veritaserum, confirming that Peter had betrayed James and Lily while revealing his resentment and motives. Harley chose to give Peter a chance to fight her so she could clear Sirius’s name, and they headed for the Forbidden Forest.

• Dumbledore summoned Snape for Veritaserum while Sirius and Peter accused each other of betraying the Potters.
• Under Veritaserum, Sirius explained that he had accepted imprisonment as punishment for trusting Peter and suspecting Lupin.
• Peter admitted that resentment, fear for his mother, and a desire for power had led him to serve Voldemort and betray the Potters.
• Dumbledore told Harley she could decide Peter’s fate, and Harley offered him a fight in exchange for handing him to the Ministry and clearing Sirius’s name.
• Peter accepted Harley’s challenge, and they set off for the Forbidden Forest.

Harley confronted Peter Pettigrew in the Forbidden Forest and disabled him while keeping him alive to prove Sirius Black's innocence. Dumbledore arranged for Peter to be held until the Ministry arrived, and Harley asked to help with the case the next day.

• Harley led Peter and the others to a clearing, freed him, returned his wand, and offered him a fair fight so he could be captured alive.
• Peter cast the Imperius Curse at Harley, but it struck a Magic Mirror while Harley attacked him from concealment.
• Harley used her Medusa magic and Spider Silk to break Peter's bones and subject him to pain without killing him, then stopped when Professor Dumbledore asked.
• Professor Dumbledore used Fawkes's tear to heal Peter enough to ensure the Ministry would not suspect coerced testimony.
• Professor McGonagall praised Harley, questioned her familiarity with the Forbidden Forest, and reassured her that students sometimes sneaked in.
• Dumbledore said he would keep Peter at Hagrid's Hut until the Ministry arrived, and Harley asked to help with the case the next day.