Riddles and secrets woven by death... They are on the heels of the famous expert analyst Drongo. One day at the airport he accidentally meets businessman Nikolai Suteev. And now, just two months later, the detective is asked to investigate the murder of Suteev, who was shot dead in his own entrance. Drongo begins to collect evidence, study other people's destinies, characters, motives of behavior; he gets to the bottom of the deepest secrets and confessions - he does what he has done hundreds of times. But what was revealed in this investigation plunges Drongo into shock, and he is forced to admit that the diabolical invention and resourcefulness of the killer deserve... admiration!