Two old pensioners quarreled, and one of them shot the other... An absurd, primitive “everyday routine” that ideally fits the definition of “murder in the heat of passion”? Almost... With one small 'but'... Both the murdered man and the murderer in the past are KGB agents. And not just agents, but supermasters of their difficult, dangerous work. People who knew a lot. Perhaps too much. Alexander Turetsky, who is entrusted with the investigation, begins the case. He begins, not yet suspecting where this matter can lead him - and what the truth will turn out to be...