Architect Sture Ahrengren walks out of his job with an architecture firm with the support of his wife Kristina. He gets a position with an old friend, Balstar Ekberg, who has a big engineering job going. But Sture gets entangled in a romance with Ekberg's wife, Helena.

Kristina and Sture is married and has a little baby boy, Olle. Sture is an architect and while he is struggling with his business, his wife Kristina gets lonesome and starts to get take an interest in Sture's Norwegian architect colleague, Arne Ranck.