Friends Dina Pletneva and Svetlana Rysina discover the corpse of a handsome young man on the beach. Mark Sadovnikov and his wife, artist Rita, passing by, reported the incident to the police. The girls are detained as suspects in the murder of Alexander Sazhin. Mark Sadovnikov, an investigator at the prosecutor's office, is trying to fit the disparate pieces into a coherent, logical pattern, but new data constantly changes the picture, as if in a kaleidoscope. One thing is clear: he won’t succeed without Rita. But a wall of mutual alienation and misunderstanding suddenly grew between them. For the first time, a murder investigation turns out to be a personal matter for Mark Sadovnikov and Rita. And it is still unknown how it will all end...