How can you prove a man’s innocence if all the evidence is against him? Maksim Polyansky is arrested for the murder of his seventh wife. But detective amateur Dasha Vasilyeva is sure that her ex-husband could not have shot a sleeping woman. She decides to find the real criminal. But the forces are clearly unequal: the mysterious murderer keeps getting ahead of her, leaving behind new corpses along the way. In the heat of the chase, Dasha forgets about vigilance—and for this mistake she could pay with her life. But the killer doesn’t know what he’s gotten himself into. Not a single criminal has ever left Dasha.