The story follows Sigma Klim, who is abducted and placed in an empty facility along with eight others. They are forced to participate in the Nonary Game: Ambidex Edition, a deadly game which involves needled bracelets filled with lethal poison, allying and betraying players, exploring the facility and solving escape-the-room puzzles in order to survive and escape, as well as figuring out why they were kidnapped and who Zero is.