After years of outrunning ruthless bounty hunters, escaped convict Riddick suddenly finds himself caught between opposing forces in a fight for the future of the human race. Now, waging incredible battles on fantastic and deadly worlds, this lone, reluctant hero will emerge as humanity's champion - and the last hope for a universe on the edge of annihilation. The wanted criminal Richard Bruno 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.