The sad hero of the story, Petr, an ordinary lawyer in a construction company, is crowded into a small apartment in Žižkov with his wife and grandparents, desperately struggling with the lack of money. One day he offers an old man a seat on a crowded trolley bus and is generously rewarded for his good deed, for the unknown old man is a fabulous grandfather. He gives Peter a magic bell and the opportunity to make three wishes, but the first two slip through his fingers. For the third, the astonished man must take time to think...

Ce synopsis est en anglais : nous ne l'avons pas encore traduit.