Audrey is the only one who realizes that there are Christmas decorations in July that no one else finds unusual. The out-of-season decorations are only a prelude to the bizarre bisection of a surfer and a series of escalating disappearances of people who no one can remember except Audrey.

On Halloween night, Audrey, Nathan and Duke become trapped inside a haunted house.

When Haven falls into a deep sleep, Audrey must work with the only other person awake in town. Meanwhile, more questions arise about the Bolt Gun Killer.

Lexie, the new girl in town, joins Nathan on a hunt for a deadly trouble that changes its victims' personalities.

Audrey finds herself in a different Haven where troubles don't exist.

A paranormal trouble tears Audrey and Nathan apart just after they were reunited.

Dwight struggles to maintain order when Duke's trouble wreaks havoc around town; at the same time, Audrey and Charlotte work together to drive away a mysterious fog that has everyone trapped in Haven.

Charlotte and Audrey work on their new plan to eliminate the troubles, but something seems to be thwarting their attempts, and it's up to Nathan and Dwight to get to the bottom of it. Meanwhile, the Teagues brothers search for the mysterious serial killer who's stalking the streets of Haven.

While Duke tries to convince Hallie to reopen the thinny, Nathan tries to escape from the Void where he and William are trapped. Meanwhile, Dave must consider making the ultimate sacrifice to stop Croatoan.