Court Gentry is a former prisoner who is recruited into a secret CIA program and trained to become an elite assassin known as Sierra Six. He is highly capable, calm, and reserved, but he also has his own moral principles and does not want to hurt innocent people unnecessarily. He comes across as confident, sarcastic, and sometimes icy, although beneath his tough exterior lies a caring man. After being betrayed by the CIA, he becomes a fugitive, pursued by agents and hitmen alike.