At the center of the crime story is the very large Kremp family, living in the family villa with other relatives and a subtenant. The parents had four adult children, two sons and two daughters, one of whom recently died. The investigation focuses on the recent death of their son Jan. The young man was considered the family "fool", whom no one except his mother liked, because he played various mischievous tricks on everyone. However, his death, as Captain Exner investigates, was not an unfortunate accident, but a murder. Who could have been interested in his death? Was the murderer someone from the immediate family? Captain Exner is looking for a motive...
as kapitán Exner
as Josef Krempa
as Anna Krempová
as Věra Krempová
as Petr Krempa
as Lída Muršová
as Erich Murš
as podnájemník Rubeš
as Míla Léblová
as MUDr. Hugo Bažant
as MUDr. Rous
as poručík Vlček
as poručík Beránek
as nadporučík Čarda
as Jan Krempa
