Father Unknown is the second part in the series about a young danish woman, Maia Niemann, who was falling in love with a German soldier during World War II, in Denmark. The story takes place in Copenhagen, 1944:The Danish government has been deposed and the police interned. The resistance movement has developed into a powerful force which, in the highly tense climate, is committing terrorist acts against vital German interests. As the fortunes of war turn, public reprisals against all collaborators and Danish women with German boyfriends are increasing.