The film follows Mats. A boy in his 20s with a life characterized by anxiety and paranoia. Troubled by a nightmare, he goes to visit his psychologist where he describes an unpleasant dream he has had; a nightmare in which he killed a wild animal.

On 9 April 1940, German soldiers arrive in the city of Oslo. The King of Norway faces a choice that will change his country forever. The King's Choice is a story about the three most dramatic days in Norway's history, the royal family's escape and King Haakon's difficult choice after Nazi Germany's invasion of Norway.