Katya, Zhanna and Irina are cheerful middle-aged friends. There are no secrets between them, they are used to trust each other and help with any problem. And these ladies do not have to look for trouble - trouble can find them by itself. When having diner in café, ladies notice an odd couple at the next table: a woman secretly passes an envelope to a man. And few minutes later they see this man murdered in the toilet. Before the arrival of police Katya managed not only to leave her fingerprints on the gun, but to grab a dead man's envelope with photos. And now our heroines will have to investigate this case by themselves before Katya gets convicted of murder. The victim was a private investigator who had blackmailed people he was hired to follow. They paid for his silence. The friends reviewed his recent cases trying to understand, which blackmailed was most afraid of exposure.