Kim Yun Hee supports her mother and sick brother by posing as a boy and taking odd writing job for a local book seller.  When the merchant offers to pay her a large sum to take the national exam for someone, she can't refuse.  But when a young scholar catches her and recognizes her natural talent, he pressures her into coming to study for herself.  Now, surrounded by roommates and friends who all believe she is just one of the guys, she has the chance to achieve her scholarly dreams.  But close proximity makes it hard for her to keep her secret, and as hearts and emotions become involved, things get much more complicated.