The wanted criminal Riddick arrives on a planet called Helion Prime, and finds himself up against an invading empire called the Necromongers, an army that plans to convert or kill all humans in the universe.
Four waves of increasingly deadly alien attacks have left most of Earth decimated. Cassie is on the run, desperately trying to save her younger brother.
A play-it-safe guy must search for his wife's missing cat, bringing him face-to-face with the colorful, wacky, and sometimes, the more dangerous element of his neighborhood, forcing him to confront his fears and rethink his M.O.