Of the four friends, Sveta has always been the most principled and reserved. A school English teacher, smart and beautiful, she was confident in every day, every important action, her world was calm and understandable. Exactly until the day when Anton, her first love, her first man, returned to her life. The man who betrayed her trust. But what to do if the old feelings did not disappear, but became even stronger and deeper? And what to do if your beloved is married, and his son is her student? Will Sveta maintain her principles and resist temptation? Or is the forbidden fruit too sweet? Stop! Where did the other two apples come from? Oh, it seems like I can’t figure it out alone! But is Sveta alone? She has three best friends! One for all, and all for one!