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

A drowning case exposes a secretive family compound on the outskirts of Haven, from which children have disappeared under mysterious circumstances.

With Nathan's help, Audrey finally locates Lucy Ripley and goes to confront her. Meanwhile, Duke and Dwight join forces to discover what Duke's father Simon left for his son.

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 Duke try to help Audrey search for a troubled killer after a string of murders take place at the Haven High School.

Duke is ejected from the barn and rescued by a young woman; Audrey is missing and the Troubles are worse than ever.

Audrey fights to remain herself as she tracks down William to sever their ethereal connection

Audrey, Nathan and Duke's victory over William feels hollow as they deal with the aftermath of Duke on death's door, Mara in control of Audrey's body, and a strange trouble supernaturally silencing citizens all over town.

Duke struggles to accept Jennifer's death; Nathan searches for some shred of Audrey in Mara's cruel personality; Dwight shoulders the heavy burden of holding Haven together.

Nathan receives otherworldly help as he works to track down a terrifying killer; and Duke reaches a crossroads after he has an alarming vision of Haven's future.

Hope of ending the troubles begins to fade as the heroes struggle to rebuild the Barn in the face of mounting obstacles. And while Dwight is tempted by a surprise gift, Nathan finds himself considering a devastating sacrifice.