Kang Seok-Ho (Kim Soo-Ro) is an ordinary lawyer and former bike gang member. He then takes a position to revive a third rate high school named "Byeong-Mun High School". To revive the school, Kang Seok-Ho needs his students to become accepted into prestigious universities. Because of this, Kang Seok-Ho decides to teach a bunch of rebellious students (Hwang Baek-Hyeon, Kil Pul Ip, Hong Chan-Du, Na Hyeon-Jeong, and Oh Bong-Ku). He promises to get five of them into their most prestigious colleges in the country. Kang Seok-Ho takes students who have bad scores, and guides them to improve not only their scores but their outlook on life. One such student is Hwang Baek-Hyeon (Yoo Seung-Ho) a defiant and headstrong student who is similar to Kang Seok-Ho at that age. Their strong personalities causes them to have clashes, but gradually, Hwang Baek-Hyeon opens up to Seok-Ho's teaching methods and eventually becomes the best student in the class.