A single mom who has been widowed at a young age, Yeong-soon runs a pig farm, and raises her son Kang-ho by herself. She becomes a "bad mother" - hard on her son because she doesn't want him to grow up penniless nor powerless. Thanks to her discipline, Kang-ho grows up to be a prominent prosecutor, but loses his memory due to an unfortunate accident and becomes a 7-year-old again. Young-soon decides to become a "bad mother" again for Kang-ho in this comforting and touching comedy series that tracks the journey of recovery between mother and son.