Bruce Willis stars as Clay, a hardened mechanic selected to maintain an interstellar ark, leaving Earth from a catastrophic plague. Bound for a new planet, Clay and his small crew are responsible for the safety of the last few thousand surviving humans. But when a teammate is brutally murdered, the crew discover a terrifying new threat; a vicious, shape-shifting alien creature whose goal is to wipe out the human race before they reach their new home. Hunted by their invisible enemy, Clay must find a way to fight what they cannot even see and protect mankind from total extinction. Thomas Jane (The Predator), Cody Kearsley (Riverdale) and Rachel Nichols (Star Trek) also star.