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's siblings and their spouses go missing, while the remaining guests find the chapel door locked. Finding the key inside the envelope Beatrice gave Maria, everyone enters and find the missing people murdered inside, along with some of Kinzo's hidden gold. Jessica and Kanon are ambushed by Beatrice, who summons her legion of goat servants against them. Kanon fights off the goats until Beatrice summons two Stakes of Purgatory, Asmodeus and Satan, who kill Jessica and Kanon. In Purgatory, Battler and Beatrice suspend their game to determine how the first six people could have been murdered inside a locked room. Battler begins forming several theories, but Beatrice counters most of them, using red text to speak the truth. However, Battler manages to catch Beatrice off guard by theorizing that the culprit could have taken the key from the envelope, locked the dead bodies in the room, and put the key back where it was. Beatrice congratulates Battler, but remains confident he will submit.

After the bodies of Rosa and Maria are found, Rudolf, Kyrie, and Hideyoshi go to retrieve food from the mansion, only to be trapped inside by Eva-Beatrice. Two Stakes of Purgatory, Leviathan and Belphegor, are sent to kill Rudolf and Kyrie, though they manage to outmaneuver and defeat them. Eva-Beatrice summons more powerful furniture, the Siesta Sisters, who successfully kill Rudolf and Kyrie. Hideyoshi confronts Eva-Beatrice to knock sense into her, but is killed by her as well. Beatrice berates Eva-Beatrice for ignoring her advice, but Eva-Beatrice tells her off, revealing she knows that acting dignified is only a means for Beatrice to get back in Battler's good graces in Purgatory. However, Battler is convinced to continue playing with Beatrice if he is to make any progress, though he still refuses to forgive her. Virgilia, meanwhile, meets with Beatrice and encourages her to act more passively if she is to make Battler accept witches.

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.

Ange enters the Golden Land where she happily reunites Maria with Sakutaro and forces Beatrice to continue the game. Battler, however, has lost his soul due to his uncertainty of his own identity. Desperate to revive Battler, Ange confirms his qualifications as Kinzo's grandson, and reveals her own identity as his sister to him, successfully restoring him. Having broken the most important rule as a piece in the game to keep her identity a secret, however, Ange dies. With Battler's resolve strengthened and Beatrice realizing she cannot escape the game, the two engage each other in their final confrontation, with Battler's blue truth against Beatrice's red truth. Kinzo's spirit appears to protect Beatrice, but Battler dispels him in blue by confirming his death not only at the start of the fourth game, but every game thus far; however, Beatrice confirms in red that there are actually no more than seventeen people on Rokkenjima. Nevertheless, Battler manages to explain all four games through human means, while Beatrice is left completely skewered by his blue truth, but unable to die. Beatrice begs Battler to kill her and presents him the last mystery she is able to give: since Battler is the only person left alive on the island, and yet Beatrice is also there to kill him, Beatrice asks, "Who am I?" Understanding Beatrice's plight, Battler promises to solve her final mystery and put an end to her suffering. Bernkanstel and Lambdadelta, however, intend to keep Beatrice in the game, torturing her for eternity.