After his father dies, Gu Hai is pressured into handing over his seafood stall, and the seafood inside is deliberately smashed to death. At his lowest point, he unexpectedly obtains a spiritual spring space and discovers that its water can not only revive dying seafood but also purify contamination, improve its appearance, and boost its nutritional value. Gu Hai starts by buying substandard seafood at low prices and gradually opens up channels through docks, hotels, livestream e-commerce, cold-chain logistics, and directly operated restaurants. Facing crises such as local strongman Zhao Long cutting off his supply, the trade association suppressing him, and infighting within the Lin family, he repeatedly turns the tables by using the spiritual spring and ecological aquaculture methods. He transforms a polluted bay into a golden fishing ground and upgrades traditional intangible cultural heritage techniques into a commercial advantage.