Yu Yang, a graduate student at Ocean University, fell into the sea during a typhoon while trying to save his research data. When he woke up, he had become the "Son of the Sea God" in a primitive tribe on Bibo Island. Faced with dwindling catches, rampant pirates, and a meddling priest, he resolves to change his fate with modern marine technology.
He improves fishing gear and doubles the catch, predicts the tides to prove his "miracles," sets clever traps to defeat the pirates, and pioneers ocean farming and herding, cultivating pearls and establishing currency. Yu Yang transforms from an outsider into the "Admiral of the Sea," leading the islanders across the civilizational divide. But his exploration of mysterious shipwrecks and underwater ruins reveals the grim truth behind a world-ending flood: this world is actually an experimental ground for an advanced civilization!