Qin Changye traveled through the Shang and Zhou Dynasties and became an immortal. He watched Ying Zheng grow from a boy to the First Emperor, but chose to sleep at the peak of the Qin Dynasty. Two thousand years later, Princess Changle of the Tang Dynasty was critically ill. Xiao Sizi dug up the ancient tomb and awakened the sleeping imperial master, which also brought the mystery of immortality to Li Shimin.