Lu Li, the blue-scaled demon king who has been practicing for thousands of years, was originally a Mahayana monk who withstood the nine-day thunder catastrophe. After accidentally crossing over, he was bound to the strongest river god system and was assigned to guard a small river. At first, he resisted wholeheartedly. After successively completing tasks such as rescuing people who fell into the water and clearing evil spirits from rivers, he successively harvested top treasures such as the Purple Green Sword and the Nine Dragon Divine Fire Shield, and his attitude completely changed. His Buddhist lineage was stationed at the Baishui River, and he rose to the rank of Lord of the Qinghe River. He calmly dealt with the geniuses of the immortal sect and ancient evil spirits, and eventually became famous throughout the world. With his supreme cultivation, he traveled across the three realms and became the top river god who shocked the world.