In-ho (Joo Jin-mo) fell in love with Mi-joo (Park Si-yeon), a new transfer student, at first sight, but they have been separated for 10 years. In-ho, who is now a member of the high school judo club, finally reunites with Mi-joo. However, the former princess who was once a rich girl has disappeared without a trace, and the sweet love is just an illusion. Mi-joo's mother has become an alcoholic after her business failed, and the villain Chi-kwon (Kim Min-jun) kidnaps Mi-joo and abuses her under the pretext that Mi-joo's mother owes gambling debts. After In-ho stabbed Chi-kwon with a knife, he was imprisoned in a correctional facility, and Mi-joo disappeared again. Seven years later, the two met again. But by chance, this time they became the bodyguard and mistress of President Liu (Joo Hyun).