The film is about the health resort Granhedsgården in Dalarna, Sweden, and they have a problem. They don't have many guests at all and something must be done. At the same time, Stig-Helmer is a little depressed after his girlfriend has left him, and so he lives on junk food. His best friend Ole invites him to come along to the health resort Granhedsgården. Now, the craziness begins.
Сухопутный бабник Стиг-Хельмер и его норвежский друг Оле по ошибке попадают на баржу. Они прибывают на остров в архипелаге и должны провести Иванов день среди модных богатых людей, их вечеринок с шампанским, их летних домиков и ежегодных гонок на яхтах.