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.

Barbro and Ulla are two Swedish friends who maintain the myth of Swedish liberty and sexual appetite. Evert and Jan-Olof, their spouses, are not worse, and have competitions about who can give their respective wife the most pleasure.