Politesse Tong Zhen's (Jeon Ji Hyeon) cunningly tough nature is very hard to handle. One of the poor fellows to find out about that is handsome secondary school teacher Ming Yu (Jang Hyuck) who spares no efforts to help people in need. When Ming tries to assist others in solving a pick-pocket case, Tong mistakes him to be a criminal. As a result, his reputation suffers even though he is completely innocent. After Ming is assigned to the red light district to help solve problems of needful students Tong pops up again as his official bodyguard. As luck would have it, the involuntary duo runs into a drug trafficking ring, which has unforeseeable consequences.
