한때 '날라리'였던 젊은 엄마가 다시 고등학생이 돼 한국 교육의 문제점을 정면으로 마주하면서 헤쳐나가는 통쾌활극

Eun O, a son born out of wedlock of the former Chancellor Kim, travels around the nation as he is interested in nothing, even women, money, or fame. Since his childhood, Eun O has been able to see and talk to ghosts, and this ability has bothered him so much. Eun O meets A Rang, a clumsy, brazen, yet lovely ghost. A Rang strives hard to find out who she was when she was alive, only to face despair. But she teams up with Eun O, a district magistrate, clears up cases one by one, and gets close to a big shocking truth.

Woo Ri, an intelligent 9-year-old girl, never knew her father's name. She stands by her deaf mother's side with Young Gyu, a not-so-smart man who falls in love with her mother, and Ma Ru, his son. A man who hopes to inherit his grandfather's company running by his stepfather named Dong Joo meets Woo Ri years later. He teaches her how to play the piano. In a world of uncertainties, the two now learn to listen to each other's hearts while plotting revenge against Dong Joo's stepfather.