A loving husband and happy father of two, Alexei Kisanov chose an unusual and far from peaceful profession: he supports his family by working as a private detective. However, real life is very different from movies and books, so instead of mysterious cases, the modern «Sherlock Holmes» exposes unfaithful wives and takes on other uninteresting assignments. Everything changes when he has to investigate the death of psychiatrist Mikhail Dmitrievich Kozyrev. Strangely, Kozyrev helped people with suicidal tendencies, only to later throw himself out of a window... Or did he? Alexei tries to shed light on the circumstances of his death and protect everyone who knew the doctor from an unknown threat.
