After the tragic Rokkenjima Mass Murder Incident in 1986, Ange Ushiromiya stands as the sole survivor of her family. Plagued by guilt for not joining her parents and brother Battler on the island, Ange yearns to uncover the truth behind the harrowing ordeal. Struggling with isolation and despair for 12 long years, Ange's world crumbles around her. Just when she teeters on the edge of surrender, the Witch of Miracles, Frederica Bernkastel, appears before her. Known for observing Beatrice's twisted games, Bernkastel proposes a tantalizing offer to Ange—to unveil the secrets of Rokkenjima and seek vengeance against the perpetrator of her family's demise. Despite the uncertainty shrouding the outcome, Ange agrees to assume the mantle of the Golden Witch and ventures back in time to aid Battler. This newfound partnership injects Battler with renewed determination as they navigate the ever-shifting game board, facing unforeseen challenges together.