A group of individuals, including the brilliant puzzle solver Akira Shiroyanagi, find themselves unexpectedly transported to a strange room from modern-day Japan. Bound by shackles, they are informed that the world has deemed them dead and they are now subjects for groundbreaking research. This research involves extraordinary abilities that can amplify physical prowess and manipulate reality itself. While most are paralyzed with fear, Akira sees the situation as a thrilling challenge. Each participant is granted a unique ability and thrust into a series of trials, ranging from intimate duels to chaotic battle royales where even death is a possibility. As the group grapples with their grim reality, Akira resolves to outwit his rivals and uncover the secrets behind the enigmatic organization orchestrating these events.