Music producer and composer Ha Rib made a contract with the devil to trade his soul for fame. This devilish transaction brought him all the fame he could ask for, producing many hit songs. As the contract expiration draws near, he bargains with the devil for an extension. For that, he must find another person to sell the soul. Ha Rib finds a perfect candidate, but contemplates because she would have to suffer for 10 years for his selfish fame.

After confessing her love in elementary school to her crush, Maewnam is literally crushed when he rejects her in front of all his friends. He calls her ugly and it's at that moment that she decides to wear a box on her head. Maewnam is really damaged by those events and she hides behind the box, truly believing that she's ugly. Forced to return to school, Maewnam meets Minton and Zero. Minton is sweet, friendly, and new to the school while Zero is a notorious troublemaker who uses his fists to solve his problems. The question is: who's the boy that called her ugly all of those years ago? Is it Minton? Is it Zero? Is it another person?

Из-за предсказания прорицателя-шарлатана Я Но всю жизнь пришлось притворяться мальчиком. Однажды она случайно спасает босса бандитской группировки Цзы Фэна и его сестру. В знак благодарности этот мафиози предлагает Я Но стать его братом. Видя своё безысходное положение, девушка соглашается. Нуждаясь в работе, она принимает предложение стать помощником Цзы Фэна. Однако рядом со своим названным братом впервые за 26 лет Я Но почувствовала себя женщиной. Что теперь она будет делать?