Thirty years after his battle with the Deadites, Ash works as a stockboy at ValueStop. However, when he inadvertently recites a verse from the Necronomicon, Ash brings back the evil... and he's not the only one that the Deadites want.
Kelly leaves to check on her mother and takes the Necronomicon with her. While Ash and Pablo have dinner with Kelly and her parents, Agent Fisher tries to track down Ash at the trailer park.
Ruby interrogates one of the Deadites at the Maxwell farm. Meanwhile, Ash and his new allies visit Books From Beyond, and Lionel has the owner summon a lesser demon to decipher the Necronomicon for them.
While Ruby agrees to lend Amanda a hand tracking down Ash, Ash, Pablo and Kelly meet Pablo's brujo uncle. However, his attempts to guide Ash to the truth are short-circuited when an enemy within the group is revealed.
The demon possessing Kelly tries to kill Pablo, while the brujo unwittingly prepares to exorcise it from Ash. Meanwhile, Ruby and Amanda follow Ash's severed hand.
Ash, Pablo, and Kelly stop off at a diner for a meal, but the Deadites follow them there. So does Amanda, who calls in her boss Boyle to arrest the trio. Meanwhile, Ruby confronts a Deadite possessing the brujo and goes on an unexpected trip.
Ash takes Pablo, Kelly, and Amanda to Lem's militia camp to get the weapons they need against the Deadites, and Ash makes a decision. Meanwhile, Ruby arises from the flames, while a visitor arrives at the cabin.
Ash discovers that his severed hand has a mind--and a body--of its own. The knowledge will cost one of his allies dearly as Ash tries to bury the Necronomicon in the root cellar beneath the cabin where it all began.
After dealing with the Necronomicon's newest evil, Ash sends Pablo and Kelly to take the hikers to safety while he disposes of the body. While they meet with Ruby, Ash learns that his plan may not do what he hoped.
Ash and Kelly try to rescue Pablo, who is possessed by the Necronomicon. Meanwhile, Ruby prepares her master plan to control the evil of the Deadites.