Lu Cilan, a down-and-out fisherman struggling to survive in Xiguang Fishing Port, accidentally bound the "Deep Sea Catch Book" in a desperate situation. From then on, his life was completely reversed! The book can provide early warning of tides, accurately identify rare catches, and even guide the undercurrent of spiritual energy. He easily caught giant lobsters and soul-gathering fish, and became rich overnight. Faced with the difficulties and covetousness of Fatty, the fishing tyrant, Lu Cilan repeatedly slapped him in the face with the help of the book, and his reputation was soaring and he became a legend in the port. When he went deep into the ocean, touched the aura of the ocean, broke through the limits of mortals, and entered the spirit-guiding realm, he found that a wider ocean world was opening up to him. Purifying polluted sea areas, fighting violent sea beasts, exploring ancient ruins... The mission of the book guides him to go deep into the unknown and reveal the secrets hidden in the deep sea step by step. And the distant conch girl seems to be waiting for his arrival. This is the legendary story of a fisherman who counterattacked and became a king, controlling the deep sea and protecting the blue!