After a breakup with her boyfriend, an office worker drowns her sorrows at a pub and spills wine on a stranger --who won't remain one for long.

Liu Qian Zhi, a disciple of the Buyu Sect who subdues demons and slays demons, accidentally met Xiao Qing, a fish demon who wanted to cultivate into a dragon. Xiao Qing lied that she was also a demon exorcist in order to prevent others from discovering her identity as a fish demon. After that, the two set on a journey together and experienced various difficulties and obstacles.