The Ushiromiya family gathers on Rokkenjima, a small island off the coast of Japan, for their annual family conference to discuss how the inheritance of the ailing family head, Kinzo, will be distributed among his children and their spouses. Battler, who has not attended the conference in six years, notices a new painting in the foyer of the mansion. He is told that it is a portrait of the "Golden Witch" Beatrice, who had supposedly given Kinzo all his wealth, and who Kinzo desires to see again. Battler, however, does not believe in witches or magic, and doubts she exists. A typhoon approaches the island, and Maria is left outside by her mother Rosa while searching for a wilted rose George had marked for her in the garden. When it begins to rain, Battler, Jessica, George, and Rosa go outside to find Maria with an umbrella she did not have before, which Maria says Beatrice gave her.

The servants try to explain what happened to the others, but when they return to the room where Nanjo and Kumasawa were killed, their bodies are missing. In an effort to gain Rosa's trust, the servants give their master keys to her. Still suspicious, however, Rosa sends the servants off once again, this time with George deciding to accompany them. Put off by Rosa's paranoia and not wanting to suspect his family and friends, Battler begins to accept Beatrice as a witch. Meanwhile, the other servants learn about the mirror Shannon smashed, and remember that Natsuhi was in possession of a similar mirror, which they believe should help them. George, Shannon, and Gohda retrieve Natsuhi's room key from her corpse, but are chased by Beatrice and her furniture along the way. The three manage to enter Natsuhi's room, but Gohda is killed by Beelzebub while he tries to keep the witch's furniture at bay, allowing Beatrice to confront George and Shannon herself.

Battler decides to give Beatrice another chance to change her ways, so Beatrice goes to the real world to visit George, who is still grieving over Shannon's death, and offers to bring Shannon back to life. However, her powers have greatly diminished, but with George's assistance, she manages to resurrect Shannon. Sensing this, Eva-Beatrice kills George and Shannon shortly after they reunite, along with Krauss and Natsuhi in the process. Shortly after the survivors discover the bodies, Jessica accuses Eva of being the culprit. Eva panics and accidentally fires her rifle at Jessica, blinding her with the muzzle flash. While Nanjo escorts Jessica away to treat her, Jessica insists he go back to keep Battler out of danger, but Nanjo is killed by Eva-Beatrice before he can, leaving Jessica completely defenseless.

Jessica and George are about to land their blows when Gaap teleports them into each other, killing both. Temporarily resurrected Jessica calls Battler to warn him. The hostages break out of Kuwadorian, but are killed off until only Kyrie remains. Kyrie calls Battler as well and tells him to believe in witches. Maria is sent off to take her test when Battler receives a call, this time from Beatrice, and goes to meet her, discovering Gohda and Kumasawa dead in the storehouse. Beatrice gives Battler his test: to remember a sin he committed, however, Battler is clueless as to what that may be, much to Beatrice's frustration, prompting her to take her anger out on Kinzo by killing him. Having lost her interest in the game, Beatrice decides to suspend it by deeming Battler unqualified, revealing that his birth mother was not Asumu as he had believed, and claiming that he is not Kinzo's grandson Questioning his own identity, Battler fades and Beatrice retires to the Golden Land with Maria.