When their circus tickets get swiped, the Jönsson League boys hatch a plan to steal them back, but end up suspects in an even bigger crime!

Christmas 1945. In a train from Stockholm to Berlin are a motley collection. It is the failure of the author Gunnar who wants to leave his old life and make a contribution in Berlin; physician Henry who plan to marry Marie and likewise Henry's current wife Karin, who he plans to kill during the journey, the middle-aged gay couple Pompe and Sixten, a soldier going to Uppsala but is on the wrong train: the cheerful and cynical old Margaret, and a dressed elf and a surly conductor. With the train are also a number of Baltic refugees accompanied by two nuns to be sent to Germany.

The young Jönsson gang's plan to steal "millions of filmisar" faces problem after problem before uncovering something much greater.