In this movie we find out what happened to Riddick after his disapperence in Pitch Black. We find Riddick doing the usual living rough and being chased by bounty hunters. Riddick must travel to see an old friend in New Mecca who seeks Riddicks help in fighting the dreaded Necromonger army. We also find that Riddicks friend "Jack" has been locked up in a fiery prison called Crematoria. Named as such because the surface temperature reaches over 700 degrees. If you step outside during "sunrise" you are cremated. Riddick must first save "Jack" whose new name is Keera from first the prison and then from the hold of the Necromonger army. Riddick journeys back to New Mecca to confront the leader of the Necromongers and to fight for Kerras very soul and for revenge for his friend. But will Riddick succeed, or will the unstoppable Necromongers counquer Ridddick as well?