Just as troubled medium Roman Mercer prepares to leave the small town of Port Moore, an earthquake strikes the Alaskan island and awakens a supernatural force bent on destruction.

Roguish smuggler Billy sails into Port Moore to find his hometown disturbed by recent events, and as he moves to distribute his latest shipment, his beloved boat and only escape is overtaken by a presence of his past.

As churchgoers flourish in numbers, Reverend Dan soothes the anxieties of the townspeople. When the hauntings escalate to a possession of a young boy, Dan wrestles with the thought of performing an unsanctioned exorcism.

A power outage sends Port Moore into a tailspin and somehow makes the ghosts stronger, prompting Roman, Jimmy, Landis and Doug to trek up to the dam to get the power back, but a long-buried town secret threatens to tear the group apart.

With his body in critical condition, Jimmy's spirit becomes trapped in the nightmarish ghost realm; Roman pursues Dan, looking for answers about his mother's death.

An arrival from Lambda headquarters gives the town hope for the first time in weeks as they distribute supplies and promise to get everyone off the island; the eccentric young CEO Daphne Vikander takes great interest in Roman.

Lambda's attempts to experiment on their confiscated pod go awry when a grotesque Norm emerges from the ghost vessel and unleashes havoc on anything in his path; a monster hunt begins.