The inhabitants of the small North Sea island of Sløborn have no inkling of something bad when an American sailing yacht capsizes on its shores. On board a dead couple who apparently committed suicide.

Schoolgirl Evelin realises that she is pregnant. Classmate Herm makes an observation.

Evelin's father discovers that the dead on the yacht died of the dangerous pigeon flu. Policeman Mikkel continues to investigate.

The terrible truth has become clear: the pigeon flu has completely engulfed the island. Two sick students have to be taken to the mainland. Panic breaks out among the residents.

The inhabitants of Sløborn bury their first victim of pigeon flu. Everyone comes together in the cemetery. Evelin feels totally sick herself.

The pigeon flu continues to spread and Sløborn has to be sealed off. The island is to be gradually evacuated. This news causes concern on the Ostergaard farm.

The Bundeswehr has now arrived on the island to support the evacuation measures. Antibodies against the virus are found in Evelin's blood.

The situation is getting out of control. Evelin's smartphone video from the clinic causes insecurity among the islanders. Insurgent Erik rages.