Audrey's surprise birthday party at a local hotel goes awry when a shapeshifter stalks the partygoers, and nobody knows who can be trusted.

The residents of Haven have their worst fears come to life while Nathan's "trouble" seems to vanish.

Audrey and Nathan investigate a series of strange incidents where the only common factor is water. Meanwhile, Duke insists on tailing along on the officers' investigation, while the Teagues do some digging on Tommy's background.

Nathan and Dwight race to search for the trouble behind a series of exsanguinated corpses; Duke must convince his half-brother to leave Haven before he learns the truth of the Crocker family trouble.

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

Audrey must call in outside help as she is no longer immune to the troubles and Nathan may be lost forever.