In the 21st-century of Empire Era , a mysterious man from outer space named Ji Shichuan adopt a human girl named Yun Xi who was abandoned by her family, in order to find the lost Spirit Pearl from 500 years ago. On the night of the Blood Moon, Ji Shichuan planned take the Spirit Pearl from Yun Xi's body and extend his own lifespan with it. However, as the two spent decades together, Ji Shichuan unexpectedly discovered a past-life connection with Yun Xi...