Jeong-do became a Seoul University Law student with the and sacrifice of his mother. However, ever since his mother ed away, he hasn't able to the bar exam for 10 years, as his rich girlfriend Jin-kyeong waits for him. To make matters worse, his father is fighting with lung cancer and he has medical bills to take care of. Then appears Kyeong-hee, a girl Jeong-do almost became siblings with due to his dad's affair with another woman..