Even on vacation, operative Leonid Somov cannot relax for a second. A trip to the warm sea to a Crimean sanatorium and a chance acquaintance on the beach with a strange woman, Viola, has already turned into a truly nightmare for him. Viola begged Leonid to listen to her, she allegedly knows confidential information regarding a criminal case three years ago. However, the girl did not have time to tell anything. Arriving to visit her at the appointed time, Leonid found her dead. She will no longer be able to tell anyone her terrible secret, which took her to the grave. But the criminals think differently, and now the hunt has begun for Somov himself...