Gleb Mechnikov seems to be tough and principled. He is used to solve all problems on his own and keep his word, which commands the respect of friends and colleagues. The only comfort and ray of light in Gleb's life is his daughter Kristina. The man raised her on his own, without a wife or any support from his family. The girl is 16 years old, and her relationship with her father is not simple. Kristina is still a teenager and doesn't understand much. Her impetuosity, constant resentment and intolerance will create many problems that will change the fate of the father and daughter forever.