Sungkyunkwan, Josun s most prestigious school, has its own set of rigid rules (e.g. no girls!) that even the king can t touch. But that's all about to change because of four very special students! Kim Yoon-hee is a super smart girl, but she was born in an era when women were forbidden to study. To help support her grief-stricken family, she decides to pose as a boy and earn * from lazy scholars by doing their homework. One thing leads to another and she finds herself being accepted to Sungkyunkwan! But will she be able to hide her true identity (and avoid the punishment of death) Yoon-hee becomes friends with Lee Sun-joon, an uptight son-of-a-noble who loves following the rules, Moon Jae-shin, a young man who is scarred by his brother s tragic death, and Gu Yong-ha, a spirited soul whose life is a bit more complicated than he lets on. These four unlikely friends find themselves embroiled in romantic rivalries, campus politics, and even a top-secret mission to help the king change the course of Korean history!