Natalia Krechetova is the owner of a beauty salon. She stops by the salon to meet her friend Anna after a rejuvenation procedure, and discovers in the beauty salon the corpse of a woman with a green mask on her face and a knife in her chest. The beautician of a rival salon turns out to be murdered - the first victim in a series of brutal murders. The police suspect Natalia, and The friends have no choice but to take up the investigation themselves. A folder with incriminating evidence accidentally falls into their hands, after which a series of assassination attempts and murders begins. The friends will have to solve the riddle and understand how the secrets of the past are connected with the murder in Natalya’s beauty salon. And also find out who they wanted to kill during the procedure.