Trapped alongside six others in a stark white room with no memory of how they arrived, Keisuke listens as an unseen voice declares the rules of a high-stakes game meant to grant their release. Panic spreads when resistance brings immediate and severe repercussions for one member of the group, leaving everyone shaken. Nemu recognizes Keisuke’s hidden turmoil and seals an unexpected pact with him, prompting the young man to steel himself for the challenges ahead in order to shield his childhood friend Kanae and find a path back to normal life.