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.

After one of the family meetings in 1984, Shannon admits to Jessica that she has a crush on George. Eva mentions that George will be taking part in an arranged marriage to keep Shannon away. Shannon prays for help from Beatrice, who appears and makes a deal with her: in return for smashing a mirror in the island's shrine that limits her power, Beatrice will guarantee George's love. Shannon at first refuses, but in 1985, succumbs to temptation and smashes the mirror. In 1986, Jessica confides to Shannon that she has a crush on Kanon. Jessica manages to convince Kanon to come to her school festival, where Kanon is perplexed at seeing a different side of Jessica. He refuses to get into any relationship with Jessica, stating that people and furniture are never meant to be together. He then confronts Beatrice and accuses her of toying with people's emotions. Beatrice merely laughs and says that no matter what happens, her power will return and the path to the Golden Land will be opened.

Rosa recounts how she met the human Beatrice confined in a hidden mansion, Kuwadorian, on the island twenty years ago and helped her escape, only to see her accidentally fall off a cliff to her death. Beatrice confirms to Battler that she truly died as a human, and that there are currently no more than 18 people on the island, forcing Battler to accept his loved ones as possible culprits. Genji, Shannon, and Kanon are later summoned to Kinzo's study, where they see Beatrice offer him as a sacrifice and kill him. Kanon is pit against the seven Sisters of Purgatory, defeating Lucifer in a duel, though he and Shannon are overwhelmed as they try to fend them all off at once, prompting Genji to euthanize Shannon and Kanon before he is put to rest by Ronove. The Sisters search the mansion for more sacrifices, killing Gohda in the process. They find Kumasawa as well, who claims to have been waiting for Beatrice. Beatrice reveals Kumasawa to be her predecessor and teacher, the former Beatrice.

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.