Gleb Barnashov is a tough operative, but has been demoted to the inspector of juvenile affairs. In addition, his wife left him, and he is raising his daughter Yulia alone, who hates him and blames him for the breakup with his mother. Barnashov is a man with principles, but he will have to sacrifice them in order to establish contact with his daughter. To do this, he registers in a social network under the guise of a teenage guy.