A simple yet proud farmer in the year 1922 conspires to murder his wife for financial gain, convincing his teenage son to assist. But their actions have unintended consequences.

In a gritty and alternate 1985 the glory days of costumed vigilantes have been brought to a close by a government crackdown, but after one of the masked veterans is brutally murdered, an investigation into the killer is initiated. The reunited heroes set out to prevent their own destruction, but in doing so uncover a sinister plot that puts all of humanity in grave danger.

Shawn, Gus and Juliet have relocated to San Francisco. After Juliet's partner Sam is shot, the Psych team attempts to find out who did it and why. Additionally, while a mysterious organization is blackmailing Juliet (by insinuating she has done something illegal), Shawn refuses to get married until he can locate his grandmother's stolen engagement ring, Chief Vick's daughter Iris has fallen in with a bad crowd, and Gus is being pursued by an attractive woman who uses all the best moves in his own playbook.

Richard B. Riddick has been in hiding for five years, evading bounty hunters and mercenaries sent to capture him. After killing a crew led by the mercenary Toombs and stealing his ship, he heads to New Mecca on the planet Helion Prime in the Helion System, after Toombs reveals his bounty originated there. Riddick is reunited with Imam, the man he rescued in Pitch Black (film). Imam believes Riddick is a Furian, a race of warriors long thought extinct, and wants to know about his homeworld and if anyone other than himself is left. Imam believes Helion Prime is the next planet to be conquered by a mysterious force crusading across the stars. Aereon, an Air Elemental, identifies the army as the Necromongers, religious fanatics who seek to convert everyone and kill those who refuse. The Necromongers attack, and take control of the capital in a single night. In the battle, Imam is killed and Riddick escapes.