What does women's happiness stand for? .. For Masha it is her son and job. She devoted her life just to them, forgetting about everything else. Masha is a senior research associate of the Institute of Biological Synthesis, candidate of chemical and biological sciences and, simultaneously, a tutor. Her son is in the graduating class and is actively preparing for the Unified State Examination, which only brings additional concerns to Masha: if her son fails at the exam, he will be called up to the military service. And it is in this Masha's mundane life that Alexey suddenly appears ...