FBI agent Audrey Parker travels to the town of Haven to investigate the death of an escaped prisoner who fled to his hometown. She soon discovers the man's death is merely the tip of a very large iceberg of supernatural phenomena.

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

Nathan struggles to return to Haven as Dwight reconsiders his future in the series finale, which also finds Audrey coming to a terrifying decision about how she might finally save the town from Croatoan.