Ru Xiao Lan is a young woman from the modern day. Through a series of circumstances, she travels to ancient times as a cat. Purely by chance, she meets Qing Mo Yan, who's suffering from poison, and as they kiss, they realize that they've found the solution to each other's complications. Deciding to stick together for their own gain, the two embark on a journey to find the five-colored stone that can break Xiao Lan's curse and the ghost grass that can cure Mo Yan's affliction.