Six former high school classmates were kidnapped by mysterious forces because of a shared dark secret and put into a sophisticated "Doomsday of Humanity" game. They are forced to struggle to survive in a whirlpool of mutual suspicion, alliances and betrayals, and every choice may lead to the death of their companions. The entire game is an extreme squeeze of human emotions. Only by squeezing out the last selfishness and desire for survival in their souls can the only "perfect survivor" be born.