For the past five years, Riddick has been hiding from the authorities and the mercenaries sent to him on the outskirts of the galaxy. But it is also found there, in distant forgotten worlds, in order to find out the name of the customer, he goes to the planet Helion. There he discovers that he is being searched for by a preacher, whom he once saved. He tells Riddick that the Universe is in terrible danger in the face of new conquerors. At the same time, a massive attack from the cosmos is attacking the planet, as a result of not a long resistance, the defenders' forces are broken and Helion is captured. The head of these enslavers, who call themselves necromongers, is Lord Marshall. He leads his countless army from one planet to another, erasing and destroying all who do not want to join him. He is afraid of only one person, according to the legend, only a person from a distant planet whose inhabitants have been completely exterminated is capable of inflicting defeat on him. It is Riddick that is the only creature in the Galaxy that can crush necromongers and restore peace.