Li Jishi, a descendant of well-known doctor Li Shizhen from Ming Dynasty who runs a herbal restaurant, meets Luo Mingyi who claims to have come from Ming Dynasty, and she brings along Bi Zheng, a Brocaded Robe Guard. Jishi promises to help them time-travel back, with the motive of finding a way to salvage a mistake that caused girlfriend Yan Tingting to leave him. Bi Zheng is determined to return to Ming Dynasty and marry Mingyi whom he secretly loves, but Mingyi is motivated to help Jishi here.