You , a struggling single mother who just lost your beloved son and husband . You tries to make ends meet while your boyfriend , D.O drifts from one job to another and always believing his money that he earned can survived two of you more than enough . At the same time , jaded Korean singers  Sehun , Kai and Baekhyun conceals themselves from the paparazzi until their leader who get rid himself for months return .  But one day , your unexpected meet with Sehun has changed your life . Will he be able to change your life back as before?  Can you achieve your happiness that lost for a long time ?