Takuya's world fractures when his father vanishes during a research expedition, leaving behind only questions and a grieving stepmother. Desperate to understand what happened, he trails his father's widow to a remote coastal location, hoping to uncover clues about her involvement in his disappearance. Instead, he encounters something impossible: a radiant being materializes before him and forces a strange ring onto his hand. The artifact becomes a gateway, pulling him into alternate realities where the people he knows wear different faces, live different lives, and harbor different secrets. Each world operates by its own rules, and Takuya must navigate between them to piece together the truth about his father's vanishing act. The ring offers access but no guarantees. Some versions of reality welcome him. Others want him dead. As he jumps between dimensions, the line between searching for answers and running from them blurs completely.