Tianfeng's father, Yang Xiao, was a scientist. He spent his whole life studying plants and the ocean, but made no achievements, while his junior brother Yang Cheng was quite successful. Later, Yang Cheng disappeared, and Yang Xiao sank to the bottom of the sea with the ship. Later, Tianfeng, inspired by his father, learned that Yang Cheng took his daughter Lu Hai, used amethyst as a key, entered the fourth space, and brought his evil desires to the sea. In the world, Tianfeng detects the appearance of Lu Hai, tracks her, and meets Yao Mei, who is the spreader of desire, starting a battle between justice and evil. As the future ruler of the fourth space, Nan Li will become the most terrifying opponent of Tian Feng and Lu Hai. In the final battle, Tian Feng's father will launch the fifth space of the ocean to resist Nan Li's brutal rule...