FBI agent Audrey Parker arrives in the small town of Haven, Maine, to solve the murder of a local ex-con, only to learn the enclave is home to people with supernatural powers.
Old men begin turning up dead in the town, decomposing at an increased rate, so Audrey and Nathan try to track down the source of the phenomenon and reverse it.
Audrey and Nathan investigate mysterious deaths in which one man was shredded and another received broken limbs - but the boy they suspect was responsible becomes a third victim.
Audrey and Nathan encounter another bizarre case when a member of the Haven Hunt Club is found dead in his car after seemingly being mauled by a wolf.
Audrey and Nathan investigate the deaths of two staff members at a cancer clinic who were stabbed through the heart - and suspect a shadow creature is responsible.