Kangsan Group is the most powerful Korean chaebol family, and his only heir is called the heroine. After the heroine was born, she was like a little princess living a life of clothes, hands, food, and mouth, so uncomfortable. But her parents died young, and her grandfather was very strict with the heroine when she was young. It caused her to be very lonely in her heart and did not know true love and care. One day a man called the hero appeared. This is a man who can even be a cowherd for money. He was in huge debts, so he made money by defrauding people. For this reason, he understands the cruelty of this world better. These two people whose lives were originally on parallel lines met because of a car accident, and the rude and savage heroine also had a stain in her life - she was fined 150 hours of community service. She vowed to take good care of this man called the male lead, but the male lead turned into her chief deacon at the behest of the heroine's grandfather. Why? Does the heroine's grandfather have any hidden good intentions