Kasper Berntsen is a successful stand-up comedian, who has everything he could wish for. One day everything changes. He learns that he has a serious illness, and his girlfriend puts an end to it.

A small Norwegian town experiencing warm winters and violent downpours seems to be headed for another Ragnarök -- unless someone intervenes in time.

In the near future a new phenomenon starts happening all over the world with powerful flashes of light occurring in the ocean and people from the past mysteriously reappearing. Called "beforeigners," these people come from three separate time periods: the Stone Age, the Viking era and late 19th century. A couple of years later, Alfhildr – who comes from the Viking Age – has to partner up with a burned-out police officer, Lars Haaland, to investigate the murder of a beforeigner. The pair begins to unravel a larger conspiracy behind the origin of the mysterious mass arrivals.

From a young age, Jill has acted as the responsible adult in her small family. She cares for her loving but mentally unstable mother and her younger brother. The news that their estranged father will be visiting on Jill's birthday gives the children much needed hope. When the family is struck by tragedy, Jill keeps it a secret.