One fine spring day, private detective Tatyana Ivanova suddenly realizes that she, an intelligent, beautiful and courageous woman, lacks a real man in her life. And then, as if having overheard her thoughts, a gray-haired, elegant gentleman appears next to her. Tatyana is fascinated by her new acquaintance - rocket scientist Polezhaev. However, he has no time for love affairs! His ex-wife is killed and his ninth-grader daughter is kidnapped. The professor, working in strict secrecy, was given a condition: to immediately come to the city where the tragedy occurred. Otherwise, the daughter faces death. Well, a matter of love is no obstacle, and Tatyana willingly agrees to help Polezhaev...