A year after a subglacial volcano erupts, mysterious elements from prehistoric times emerge from the melting ice, bringing unforeseen consequences.

In an attempt to fix his financial problems, Erik recruits his brother, Atli, to help him import a shipment of cocaine into Iceland. Erik thinks he’s got things all figured out, until the young Polish “mule” they’ve hired is unable to pass the drugs through her system.

As a ferry carrying 300 passengers from Denmark pulls into an Icelandic town’s small port, heavy snow begins to fall. The ferry can’t leave until the storm passes and the main road into town is impassable. A mutilated and dismembered body washes on the shore, an unidentifiable man murdered only hours ago. The local police chief, Andri Olafssun, whose personal life is in shatters, realizes a killer has descended into his town. As word spreads, order disintegrates into chaos as the ferry’s passengers and the town’s residents realize they are all possible suspects and that a killer is trapped among them.