Mercy Callo is a U.S. Black Ops soldier who finds himself the only survivor of a botched prisoner extraction mission. Forced to fight his way out of a maximum-security Chechen prison, he must keep his target alive in order to save thousands of lives.Mercy Callo is a U.S. Black Ops soldier who finds himself the only survivor of a botched prisoner extraction mission. Forced to fight his way out of a maximum-security Chechen prison, he ...