Male protagonist Lin Chen accidentally binds to a giant fish-catching system and takes over an abandoned mine pit fishing ground. The mutated big fish in the fishing ground have astonishing strength, and the fishing big shots who come to challenge them explode their rods and roll over one after another, making hard hats a must-have equipment. Everyone uses rebar, engineering winches and other hardcore equipment to fight against giant objects, constantly unlocking bounty blind boxes. The fishing ground exploded across the entire network, and as the underground dark river connected, more terrifying underwater giant beasts are about to debut.