Two men run across a rooftop, the night and the barbed wire of the prison from which they attempt to escape the only backdrop. One escapes, but the other (Martinez) re-enters his cell, an act that perplexes the prison warden and head guard. To make matters worse, the inmate in question hasn't spoken a word since his incarceration (hence his nickname, the Mute), and refuses to tell anyone why he returned. Mayhem ensues as prison officials try to discover what exactly happened that night....