A Spy Agent's Mission

Sun Shang Xiang is a spy agent who has undergone many kinds of missions. One day she is given a mission to help Prince Yue Jin ready himself to become King. The only thing is, she has to pretend to be a boy so he won't fall in love with her or be as sad when she finishes that mission. The bad thing is, he is very stuck up and mean. This mission may be the hardest one yet.