Pharmacy student Aina Zinck and doctor Yrjö Kallio are a young couple who are drawn into patterns of jealousy in their small Finnish town.

The film starts at the countryside, where station master Viirimäki is spending his summer holiday. He has gotten into the holiday mood to the extent that he wakes up from his stupor at the very moment he should already be getting back to work. Unfortunately the last ship from the island where he has been vacationing has already sailed, but as luck would have it, local residents Himanen and Kehkonen promise to help him out. Things turn out differently, however, and the attempt to help starts out an adventure filled with misunderstandings and plot twists.