Jian Feng, an agent, sneaked into the campus to find out the truth about the disappearance of his partner. In the meantime, he had to protect his partner's sister who was known as the school beauty queen. Unexpectedly, his mission as a bodyguard was more difficult than he thought. During his investigation, he met even more school belles of different types: the pure one, the proud one, and the hot one... Which one should he choose among them?!