Lilla Jönssonligan på styva linan

It is summer holidays in the late 1950s and a fun fair comes to Wall-Entuna. All children obviously want to go there including Lilla Jönssonligan. Sickan then obviously has a plan for how to get hold of hundreds of "free tickets".
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!