Chen Xi, a modern-day geology graduate student, is conducting an experiment in the laboratory when he suddenly travels back in time to the Qin Dynasty and becomes a sailor. On the orders of the Qin Emperor, Xu Fu leads a fleet carrying 500 boys and 500 girls across the Eastern Sea in search of the secret to immortality. However, a sudden disaster strikes at sea, and Xu Fu and most of the expedition perish beneath the waves. Chen Xi, Ying Zhen, Commander Han Xiao, and the others are washed ashore on a deserted island. Supporting one another, they begin a new life on the island.