A.D.A.M. — Autonomous Dueling Armed Machine — was built for war. Once peace came, the android had no further purpose, and was placed in a tower called Purgatory with other combat units of its kind to fight each other for entertainment. This particular A.D.A.M. develops something its creators did not intend: an electronic soul. It wants out. The humans recognize what has happened and deploy every other android in Purgatory to destroy it before it can escape. Beginning with bare hands and collecting weapons as it fights — weapons mounted directly to its body, firing from hands, arms, legs, and forehead — A.D.A.M. fights its way up through the tower floor by floor.