The spouses of Vera and Viktor Novikova are celebrating their 10th wedding anniversary. At the celebration, they invited Vera's sister, Nina, and her fiancé, Igor, to their home. But the holiday failed. In the evening, Nina is found dead on the street. At the same time, Valentin, who was Nina's fiance four years ago, appears in the city. Then Vera found out that he was a drug dealer and testified against him. Now Valentin is full of desire to take revenge on Vera and Igor, who took his beloved away from him.