Fisherman Shaw Linton was struck by lightning and fell into the sea, gaining superpowers to communicate with marine life and breathe freely underwater. Using this ability, he searches for treasures while tide pooling, and successively thwarts the conspiracies of local bully Derek Chadwick, rich heir Jesse Sterling, capital tycoon Quinn Carter, and seafood merchant Wu Jinhai. He protects ancient underwater shipwrecks and cold spring ecosystems, eventually promoting the cold spring to be designated as a national germplasm resource reserve, and leading all fishermen in the village to become wealthy together.