A pair of rural detectives are searching for the murderers of old Vodička. He was an unpleasant old man who apparently witnessed a crime at some point in the past. The pair slowly unravels the threads of a case that reaches deep into the past. However, the old events have long been shrouded in the fog of oblivion and the village's unwillingness to reveal secrets that personally affect each of its inhabitants. In the end, as is often the case, chance comes to the rescue, and an ordinary shirt button becomes indirect evidence of the murder...