Denmark in the '70s. The teenager Christoffer's parents Nisse and Maria have decided to move into a commune, because they want to try the alternative lifestyle. But Christoffer doesn't like it, and has trouble adapting. In school, the others tease him because he lives in a commune. As a plan from the elders in the commune, he starts in a Maoist group to learn about the real ways of the society. He doesn't like it, but when his new girlfriend starts to see what he does as cool he goes into it. But at the same time, the police start to suspect him to be the terrorist who blows up telephone booths around Copenhagen.

Fuglene Over Sundet is the gripping tale of the Danish Jews' escape to Sweden in October 1943.