In an ancient, crumbling palace, two immortal sisters, Love and Death, play an eternal chess game. Love, dressed in white, watches over the Beast, a prince whose cruel upbringing under a brutal father forced him to hide his good heart. Love placed an enchantment on him that transformed him into a creature and turned his servants into household objects. The curse breaks only if the Beast learns to love and is loved in return before the last petal falls from an enchanted rose. Death wagers three million gold coins that the Beast will fail. After Love wins the chess match, Death retrieves a dusty black book titled
Nevermore and orders two vultures to place it in the Beast's library, planning to lure Belle into its pages and bind her there permanently.
Belle, a young woman held captive in the Beast's wintry castle, has recently received his vast library as a gift. She enlists the enchanted servants to help clean it: Lumiere, a candelabrum; Cogsworth, a mantel clock; Mrs. Potts, a teapot; her young son Chip, a teacup; Plumette, a feather duster; and Froufrou, a footstool. Belle confides that she was never happy in her village of Villeneuve, where people considered her odd for preferring books to the attentions of Gaston, a preening local suitor. When the Beast clumsily tries to help clean and slips on soap, Belle laughs; he interprets her reaction as mockery, but she gently wipes his face. The servants note his restraint as a quiet sign of change.
Exploring the library's back rooms, Belle discovers a heavy black book titled
Nevermore, oddly free of dust. It feels warm and alive when she touches it. The book opens onto a living illustration, and Belle steps through the shimmering page into a candlelit château, her plain dress transformed into a silk ball gown. A young man named Henri, duc des Choses-Passées (duke of things past), escorts her to the comtesse des Terres des Morts (countess of the lands of the dead). The countess is a regal woman in black silk with emerald-green eyes; though Belle does not realize it, the countess is Death in disguise. She claims to be
Nevermore's author and says this story is being written for Belle. At the ball, Belle eats a chocolate macaron. Large stag beetles spell out a cryptic warning: Eating three things and leaving three things in
Nevermore will lead to a terrible cost. The countess dismisses them as vermin. Belle returns through the portal and hides the book, keeping it secret.
The Beast confides in Lumiere that Belle could never love him. Lumiere urges him to show Belle who he truly is. Over the following days, the two grow closer. The Beast arranges a skating outing, and Belle teaches him to skate, holding his paws. That evening, she tells Chip a bedtime story about a beggar woman who taught that love is the vanquisher of death. Later, Belle compares the Beast to the lion in the fable of Androcles, a creature hiding a thorn in its paw. He tells her brokenly that he would share his secrets if he could but cannot. Frustrated and lonely, Belle returns to
Nevermore.
The countess takes Belle by carriage to the Palais-Royal in Paris, claiming she knew Belle's mother and sent
Nevermore out of affection. Belle eats a pink tea cake, her second food item. In a confrontation hidden from Belle, Love accuses Death of exploiting the Rule of Three: If Belle eats three things and leaves three things in
Nevermore, she becomes permanently bound. The countess also shows Belle mechanical automatons, including King Otto, a dancing figure whose eyes meet Belle's with desperate longing. On the return journey, the path to the portal has grown dangerously overgrown, and Belle barely pushes through.
During a third visit, Belle encounters the madwoman in the countess's orchard. The madwoman is Love in disguise, and she presses a pair of silver scissors into Belle's hand, telling her to hide them. Belle eats a pear, her third food item, which is actually a disguised pomegranate. A strange heaviness descends on her. Before Belle leaves, the countess promises to bring Belle's father to
Nevermore, giving Belle a powerful reason to return. She rushes back for Chip's birthday party at the castle. The next morning, the Beast warns Belle that escaping into books can become escapism. In a final conversation, Belle tells him she knows he risked his life to protect her from wolves. Unable to explain the curse, the Beast gives her a heart on a gold chain that belonged to his mother. Belle puts on the necklace, whispers goodbye, and enters
Nevermore, believing she may not return.
Inside, the countess presents a figure resembling Belle's father, Maurice. Belle embraces him joyfully, but when "Maurice" pricks his finger, she wraps his thumb with her handkerchief, unknowingly leaving her third object. She then gives Henri a copper coin as a keepsake. The moment she hands it over, cracks split his face: He is a marionette. The countess reveals herself as Death. Belle has eaten three things (the macaron, the tea cake, and the pomegranate) and left three things (strands of hair caught in the countess's ring at the first ball, the handkerchief, and the coin). "Maurice" is revealed to be King Otto, the automaton, enchanted to resemble Belle's father. Death departs, declaring victory.
Belle calls for allies: Lucanos, the stag beetle who tried to warn her, and Aranae, a brown spider. She plans to recover her three objects and weaken the spell. They revive Otto by stitching a silk heart to his chest, and he returns the handkerchief. They confront Henri in the conservatory, sever his puppet strings, and Belle recovers her coin. Otto, unable to leave the grounds, asks Belle to remove his winding key so Death can never reuse him. Belle complies, and he goes still. At the castle, the Beast discovers
Nevermore standing open with Belle's ribbon on the floor beside it. Believing she stepped into the book willingly and chose to leave, the Beast and the servants are devastated.
Belle reaches the countess's château, now revealed as a ruin. She sneaks upstairs and finds the countess asleep, still wearing a bracelet woven from Belle's snagged hair. Aranae binds the countess to the bed with spider silk, and Belle snatches the bracelet. Pursued through a maze of overgrown yew trees by stone lions that have come alive, Belle reaches the portal, but
Nevermore's pages have hardened into ice. Through them she sees the Beast holding her ribbon, heartbroken. The countess appears behind her, declaring it is over. Lucanos shouts at Belle to use her heart. Belle realizes the necklace the Beast gave her is not glass but diamond, the same material her father used to cut glass. She drags the diamond across the page, slicing it open, and throws herself through.
Belle tumbles into the library, free. She hugs every servant and throws her arms around the Beast, telling him his heart saved her. She carries
Nevermore to a window and flings it into the winter wind, which tears its pages apart. Reflecting on the perfect but illusory friends inside
Nevermore versus the real, flawed friends around her, Belle tells the Beast he may not be a perfect friend, but he is a real one. When he asks if they can keep trying, Belle squeezes his paw and says she will. In the epilogue, Love and Death resume their chess game. Love declares she will win the wager, arguing that Belle is teaching the Beast to love. Death counters that the story is not over. The sisters play on, their eternal contest unresolved but tilting toward hope.