Shen Yuan, a modern aquaculture professional, unexpectedly travels through time to the Great Ning Dynasty and becomes a death-row prisoner exiled to a deserted island. His fellow prisoners aboard the ship are all overcome with despair. But when he looks at the barren island, he immediately recognizes the rich marine resources hidden in its surrounding waters. Using his modern aquaculture and survival knowledge, he builds a simple freshwater distillation device from materials found on the island, solving everyone's drinking water problem. He then identifies edible seafood, grills crabs and cooks shellfish to feed the group, and sets traps to hunt wild boars. The prisoners are completely convinced by his abilities and appoint him as their leader. While others are exiled simply hoping to survive, Shen Yuan plans to develop the wilderness and establish a fishing farm, carving out a prosperous new life on this isolated island.