Karl Alfred Karlsson goes on an adventure on the seven seas.

In a sham ceremony at the city hall, the dimwitted Fridolf is married to Margit. It doesn't take long, however, before he is arrested for bigamy. His first wife left him a few years ago, but Fridolf isn't very bright and he thought that she was dead when she wrote a letter to him saying that. She ran off to join a circus. By a coincidence, the circus is visiting Fridolf's home town and Fridolf goes to the circus with a free ticket. But at the circus all he can do is make a fool of himself.