Haven is beset by biblical plagues. Duke continues looking for information on the tattoo, with a little help from his past. Audrey and Nathan check out Audrey II, and try to figure out what to do about Chief Wuornos.

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

The town's docks start attacking people while the other Audrey Parker probes Audrey's identity crisis.

When a deadly series of electrocutions occur around town, Audrey and Nathan investigate the cause

A wedding at an isolated estate turns deadly for the guests when the site becomes sealed off and something attacks from within.

A single day keeps repeating for Audrey, who finds a deadly accident linked to the phenomenon.

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

A banker hides a dark secret that connects him to a killer hiding in Haven. Meanwhile, Duke helps a young runaway and Nathan discovers that his job is at risk.

When a Troubled individual unleashes a rotting plague inside the police station, the new Chief orders a quarantine... trapping Audrey and the others inside. Meanwhile, Duke confronts Evi about her betrayal of him.

Audrey and Nathan take a search party into the woods to find a missing boy whose disappearance may be connected to the Troubles, and receive some unwanted help from Driscoll.

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.

Haven's dead rise from their graves to reveal the town's secrets... and those of Audrey, Nathan, and Duke.