"Guardians of the Ocean, Protecting Global Marine Resources" A group of youths who love the ocean, each with their own area of expertise, come together to unleash unexpected power. Dr. Turtle has dedicated a century to protecting marine resources, serving as the mentor for the entire guardian team and witnessing the birth of numerous ocean exploration records. To deeply study and safeguard endangered resources, Dr. Turtle has organized batch after batch of elite guardians, silently defending the mysterious and vast oceanic territories. With 70% of the Earth's surface covered by seawater, the Deep Sea Special Attack Team has deployed monitoring systems worldwide to prevent foreign invasions and protect our ocean home. "The Demon King Who Seeks to Rule the Ocean," Leviathan, leads the dark army headed by Mordor in repeated invasions of the seas. Not only do they aim to seize the mysterious gemstones of the ocean's treasures, but they also wreak havoc on precious marine resources. The dark army has become the primary target for expulsion by the Ocean Guardians. In pursuit of the gemstones, Mordor has captured the living fossil of the ocean—the nautilus—using it to search for the millennium-old crystals. Led by Xiaolong Rong, the Deep Sea Special Attack Team ventures deep into the dark domain to rescue the deep-sea creatures and save the ocean town. With the help of newly acquainted marine life companions, they engage in a battle of wits with the dark army, successfully thwarting Leviathan's sinister plot and restoring safety to the entire ocean world.