A detective comedy about ex-cashiers who - except for one - have improved and lead a proper and peaceful life and mostly desperately resist the slightest reminder of their past. However, one of them, Josef Fiala, formerly known as Procházka, is one day asked to open a safe in the Sitex factory that has been slammed open with keys inside by careless employees. The operation goes well, but in time Fiala finds himself suspected of theft...