Lu Chen, a master surgeon, was caught up in the prosperous Tang Dynasty by moonlight and discovered that his childhood sweetheart Su Tang was forced to gain weight to please the powerful. He secretly used modern medicine to help him recuperate, but his improved Hu Xuan dance attracted the attention of the imperial concubine. When Su Tang was forced to perform in the palace, Lu Chen discovered that the pattern of moonlight vortex reappearance was related to the concubine's heart disease. In the choice between saving your lover and returning to modern times, the fennel from the Western Regions reveals the truth about time travel.
