For the past decade, Dexter has been living a quiet, isolated life far away from the temptations of his past. When a local hotshot begins behaving recklessly, and a mysterious stranger seems to be on Dexter’s trail, he questions whether he can continue to suppress the murderous urgings of his Dark Passenger.

When a simple missing person case turns into a crime scene, Dexter’s cabin becomes home base for the search and rescue. Terrible timing for Dexter, who is trying to reunite with his long lost son, Harrison. As Angela and Harrison become acquainted, Dexter struggles to keep his old and new worlds separate.

Dexter hopes to have a chance to make things right with Harrison, which is proving to be tough to do when there’s a full-fledged crime investigation that Dexter himself has caused. Harrison joins the high school wrestling team and quickly makes a name for himself at school. Meanwhile, a true crime podcaster from LA arrives in Iron Lake and befriends Dexter’s police chief girlfriend.