On a small, cozy Swedish islet a group of friends gather for a celebration. One of the participants finds an old magic viking instrument (Hornlike) which will yield everybody in earsight extremly horny. This film contains the wellknown falu-sausage scene, where one of the participants uses a extremely large sausage as a dildo.

Katrin, a young erotic and primitive teenager, spends her summertime at a little island in the Stockholm archipelago.