What do you get when you put a thick-skinned, acting-dumb constable and the aloof, genius daughter of the Premier in the same town?

For the sake of winning a bet, Lou Chen left her home and crossed into neighboring Liao Yue for some sight-seeing and treasure-hunting. But barely a few days into her trip, she gets embroiled in a mystery murder which leads her to meet a nonchalant, happy-go-lucky constable, who is obviously hiding an astute brain under his flippant appearance.

Turns out that this flippant constable has a birth mystery that links back to some of the most prominent families in Liao Yue. Coincidentally, this constable also seems to have something to do with her sword "Cang Feng" which apparently used to belong to his family before it disappeared 18 years ago.