Lena Zemtsova's patience has come to an end. Living, even with a charming but slacker, who is also capable of taking out a loan for his own whims without informing his wife, is too much. Having received the divorce certificate, Lena immediately started spring cleaning. Approaching the trash cans with her ex-husband's things, she heard a plaintive meow. Lena found a frightened, bloody cat in a cardboard box and rushed with him to the veterinary clinic. The chip revealed the details of the owner of the purebred animal, but it turned out that the day before she had been strangled in her country mansion. As a suspect, Zemtsova spent the night in the police station, and upon leaving, she decided to help find the killer...