Set in the Baekje era, this is the comedic chronicle of Princess Hwapyung's efforts to change herself and become a beautiful lady through dieting. Princess Hwapyung is the youngest daughter of the late king and sister of the current king, possessing both wisdom and kindness. Her only flaw is her exccessive body size. She is dealt a cruel shock on her wedding night when she was cast aside by her husband, who preferred her beautiful lady-in-waiting, Hong Dan. The humiliation is the last straw for Princess Hwapyung's self-esteem; with the help of a mystery man, she is determined to lose weight and become a new person!