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

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...

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!