Dexter's dark and top-secret past resurfaces as someone close to him begins to stalk him. Moreover, his murderous impulses come to light when he investigates the reckless actions of a local celebrity.
Dexter continues to search for Matt Caldwell and tries in every way to strengthen his relationship with his son. Dexter's small cabin becomes their safe haven on the search journey full of dangers and challenges.
Dexter tries to distance himself from the growing suspicions surrounding him when the search for Matt turns into a criminal investigation. On the other hand, Harrison gains popularity at school.
The father of the person Dexter killed makes a surprising announcement, Harrison becomes a local hero after a serious incident at school, and Angela begins investigating a missing person case.
Dexter's efforts to protect his son from addiction unleash his murderous impulses, and Angela and Molly's trip to New York City raises their suspicions about the secret life of a prominent socialite.
Someone knows Jim Lindsay's secret identity, leading Dexter to believe he's not the only serial killer in town. On the other hand, Harrison's behavior spirals out of control during a wrestling match.
Dexter goes from killer to defender of those he cares about, Angela arrests someone who may be responsible for an unsolved crime, and Harrison turns to someone very dangerous.
Dexter struggles to survive in the woods, Harrison finds himself at a crossroads when he must make a difficult decision, and Angela reveals shocking truths.
Dexter gets closer to Harrison than ever over the Christmas holiday, drawing the attention of a serial killer, and Angela begins to question the safety of Iron Lake.
In a place they eventually learn is not as normal as they initially believed, Dexter and Harrison attempt to lead normal lives. Will all the dangers they encounter prevent them from living happily?