Set in Shanghai in the late 1910s, Qian Bao Bao (Joe Chen) is a cunning young woman who assumes the stolen identity of a female instructor at an all-male military academy in order to earn enough money to help her sick mother. During her stay at the academy, Bao Bao finds herself entangled in a complicated love triangle with the flirtatious Xiang Hao (Jia Nai Lang) and the intelligent Shen Wen Tao (Bosco Wong), who are both instructors at the academy.