Top special agent Lucinda Kavsky works for a secret part of the CIA. She's given a special assignment but then set up by her own agency.

Riddick, now a hunted man, finds himself in the middle of two opposing forces in a major crusade. plays Lord Marshal, a warrior priest who is the leader of a sect that is waging the tenth and perhaps final crusade 500 years in the future. is Aereon, an ambassador from the Elemental race. She is an ethereal being who helps Riddick unearth his origins.