The Book of Doors

Cassie, Izzy, and Drummond emerge in Lyon. They go to a cafe for breakfast, and Drummond tells them about Hugo Barbary. Cassie is in a state of shock, horrified by Barbary’s violence. They discuss the magic books, though much of their history is a mystery. Izzy tells them she Googled the Book of Doors, and Drummond expresses concern that she may have tipped off other collectors. Cassie allows Drummond to examine her book, and he seems disoriented. He offers his aid in exchange for Cassie allowing him to destroy her book.

Cassie refuses to have her book destroyed. Drummond pleads with them, offering another book in exchange. They return to New York, and Drummond shows them his Book of Memories. He gives it to Izzy and explains that once he takes it back from her, she won’t remember anything about what has happened. Cassie and Izzy are both enraged, but Drummond swears it’s for her own protection. Once Izzy is asleep, Drummond offers to show Cassie his library.

Cassie and Drummond pass through shadows to arrive at the Fox Library in Scotland. Cassie is enchanted by the coziness and charm of the library. Drummond tells her he hasn’t returned home for 10 years, keeping it safe from the Woman. He reminisces about his lost friends and apologizes for removing Izzy’s memories. He shows her a room of cupboards that house the magical books and encourages her to understand why protecting them is so important. Drummond then reveals the Book of Doors’ true power: It can be used to travel through time.

In the past, alone, Drummond enjoys being back home and retrieves the Book of Doors from his collection. He recognizes that it must have traveled through time, creating two versions of it. The narrative moves into Drummond’s memories: He and his friends Wagner, Lily, and Yasmin are discussing how to categorize the books and where their magic comes from. They move to discussing the possibility of time travel, and whether the future is malleable or fixed. Wagner, who is a scientist, agrees to test the books to try to understand them better. In the present, Drummond debates what to do next.

Drummond and Cassie visit Cassie’s past. They go to a diner where they discuss the mechanics of visiting the past. Cassie reveals that at this point in time, she was away on holiday. She’s hoping to run into her grandfather. Drummond begins enquiring about the Book of Doors, but they’re distracted when Cassie’s grandfather walks in.

Izzy wakes disoriented and is concerned when she can’t find Cassie. Two men arrive at her door, and Izzy assumes they’re police with news of Cassie. They introduce themselves as Azaki and Lund. They ask Izzy about her, showing a particular interest in new books. They tell Izzy she’s in danger, but they’re interrupted by the arrival of Hugo Barbary. Although Izzy doesn’t recognize him, she’s immediately cautious. He knocks the two men unconscious and goes to Izzy. He recognizes that she no longer has her memories but believes he can encourage her to remember.

At the diner, Cassie approaches her grandfather. She sits down, explains that she’s his granddaughter from the future, and tells him of her travels. She starts to tell him about his future, but he declines, believing that no one should know their destiny. He encourages Cassie to persevere and fight for her happiness. They agree to meet again soon, then part ways. Once her grandfather is gone, Cassie breaks down in tears.

Hugo Barbary introduces himself and asks about the Book of Doors. To force her to remember, Barbary gives Izzy the Book of Pain, which inflicts excruciating agony. As he tortures her, they’re interrupted by the arrival of Lund, who knocks Barbary unconscious. He offers to protect Izzy if she leaves with him. Azaki, who appears to have died as a result of Barbary’s attack, is left behind.

Drummond and Cassie leave the diner behind and travel to a park where Drummond can see his old friends. They see Lily, Yasmin, Wagner, and a younger Drummond hanging out together. He tells Cassie about the conversations they used to have and where they were headed in life. He admits that all of them will be killed later that day by the Woman, who’s hunting the Fox Library. To illustrate the danger they face, Drummond offers to show Cassie his past using the Book of Memories.

Izzy begins remembering the events that were taken from her. She and Lund dine together, and Izzy worries about Cassie. Lund reveals that he stole the Book of Pain from Barbary and is planning to hire the Bookseller to sell it for them, making them both rich. He also took Azaki’s Book of Illusion. Together, Lund and Izzy prepare to meet the Bookseller.

In Drummond’s memory, he and his friends comment on the strange mist that has arisen around them. The Woman arrives in silence and attacks Lily, pushing a book into her hands. Lily begins violently convulsing while Yasmin attempts to use the Book of Light to disarm the Woman. However, the Woman surrounds her with mist. The Woman kills Wagner and Yasmin before turning on Drummond, demanding his library. When he doesn’t respond, she kills Lily. Heartbroken, Drummond uses his Book of Shadows to escape.

Izzy and Lund approach the Bookseller at her hotel, informing her that Azaki has been killed. The Bookseller reveals that she has been asked to keep Izzy safe and agrees to help sell the Book of Pain. They will hold an auction later that night; she estimates it will earn at least $20 million. They agree to remain with her until the auction is concluded.

Cassie emerges from Drummond’s memories. He implores her to destroy the book, but Cassie is still hesitant. She wants to go after the Woman instead. They’re unable to agree, so Cassie goes home to check on Izzy. When they arrive, they find the apartment in shambles in the aftermath of the attack. They’re accosted by Hugo Barbary, who holds Cassie hostage and takes the Book of Doors. She’s able to escape him, but he pushes her back through the door she entered through and shuts it behind her, locking her in the past.