A mysterious man by the name of Lee dwells with Aak, Hung, and Waai Fu in the dark alleyways of Lungmen City. Styling themselves as Lee's Detective Agency, they strove to run errands, investigate mysteries, and mediate disputes for their neighbors. Herein lists a few of their actual yet strange cases to go with your tea.

This is a story about justice and courage. The seemingly hot-blooded and straightforward girl, Security Captain Luo Shiqi, and the cold and resolute ranger Xia Zhiqiu, fight continuously against powerful enemies in the already-hopeless Jiu Yun Town, forging an invisible sword of justice with their beliefs and courage.