Everything is so good with Katya: a wonderful son, a separate apartment, a prestigious job and, most importantly, a loved one! They will definitely get married. But Alexei’s daughter will turn eighteen years old, and he will leave his wife for Katya. In any case, that’s what he promises... And suddenly, unexpectedly for herself, Katya reveals an old truth: you cannot build your happiness on someone else’s grief. She refuses Alexei. But he, as they say, stubbornly resisted. And Katya’s happy life is shattered. Her son is in mortal danger! In an effort to hide him from his crazy pursuers, Katya is looking for... the boy's father! What did he become, Grigory Ganin, with whom she broke up many years ago? Still the same selfish person to the core? Hasn't he changed and won't help her? Or should we still wait for help from Alexei - if, of course, he still loves Katya...