Private detective Tatyana Ivanova arrived at the Lazur boarding house in Adler with the firm intention of forgetting about thieves and murderers at least for a few days. On her first walk along the shore of the lake, picturesque mountain peaks, clean air and... a dead woman lying in clear water awaited her. The deceased turned out to be Elmira, who arrived at the boarding house with her businessman husband the night before. Mikhailov asked Ivanova to find his wife’s killer, and the best of the private detectives could not refuse. So Tatyana rested! The matter seemed simple: after all, the criminal was here, among the vacationers. Ivanova thought so until a new misfortune happened - Elmira’s husband died. An unknown killer sent the couple to the next world almost in front of Tatiana’s eyes, and now identifying him is a matter of honor...