There is stagnation in Nikita Startsev's detective agency. Summer. That is, there is no business, and there is no money, and even his wife has left for someone else. And suddenly there are two things to do at once, two interesting women and a lot of money. Businesswoman Lola Goldina is accused of murder. Complete absence of an alibi, but a whole squad of witnesses. And the wife of Nikita’s recently murdered friend Alisa Khvalyun is being pursued by a black foreign car. Valerka Khvalyun was the owner of a private security company and before his death he was installing an alarm system in the apartment of Goldina’s assistant. Coincidence? Accident? Startsev is too experienced a detective to believe in coincidences, and immediately combines both investigations into one - terrible, incredible, with such a logical beginning and unpredictable end...