Goodbye, My Love(Прощай, любимая...)

Somebody founds a body of 40-year old woman in the park in Moscow. Police closes the case thinking that she died by natural causes. But her husband Sotnikov, who is a financial analytic and mathematic is sure that she was murdered. Having no legal or medical skills, he starts his own investigation and finds the proof of the murder but also he finds out that his wife had an affair.