Rolf Allan Mjunstedt is the most famous, and according to himself, the best tram driver in Gothenburg. He is married to Bettan who he loves deeply, despite all of their conflicts.

Alexander is a talk show host on TV and a partying bachelor privately with an awful love life even though he dreams of settling down. One day his old friend Ralf brings him a manuscript for a book that he can't get published and asks Alexander to put his name on it for some more publicity. Alexander agrees without reading and finds himself in trouble when the book comes out and the views expressed in it are opposite to his own.

During an innocent party game at the friends' annual dinner on Walborg night, the hostess discovers that her husband is cheating on her with one of the friends. The discovery has significance for all the guests, as old relationships change and new ones are created.