5 years after Pitch Black, 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.
Left for dead on a sun-scorched planet, Riddick finds himself up against an alien race of predators. Activating an emergency beacon alerts two ships: one carrying a new breed of mercenary, the other captained by a man from Riddick's past.
Veteran-turned-mercenary Toorop takes the high-risk job of escorting a woman from Russia to America. Little does he know that she is host to an organism that a cult wants to harvest in order to produce a genetically modified Messiah.