Su Xianling is a novice assassin with zero experience and one day she snatches an order from her fellow clan to assassinate the current lord of the city, Dongfang Jing. With murderous intentions abounding throughout the palace, Dongfang Jing has no choice but to disguise himself as a clueless idiot in order come across as non-threatening to those hungering for power. In reality he is brave and resourceful, guarded and wary, until he finds himself opening up to and falling in love with the sweet Su Xianling.