Oh Seon-yeong, through her involvement with Baek Gwang-jin, ultimately leads her family to ruin. To repay a debt of 700,000 won, Oh Seon-yeong wants to become a tea house madam. However, a student who failed "National Literature History" unexpectedly visits her, pleading for her to pass him and leaving her some sweets. Inside was a check for 30,000 won. Seon-yeong grabs the money, runs to the tailor's, and changes her husband's test score from '30 points' to '80 points'. This causes trouble, and eventually, her husband leaves the university, while Oh Seon-yeong gets involved with Baek Gwang-jin, the tea house proprietor. However, Mrs. Oh, deceived by Baek Gwang-jin, dies without being able to see her son Gyeong-su and Professor Jang.