Qin Jun, who died miserably in his past life, is reborn back to 1996, accidentally awakening the abilities of beast speech and undersea perspective. Starting from a dilapidated fishing village with this unique skill, he roams the four seas, catches top-tier seafood, battles snakehead bullies, and discovers national treasure shipwrecks. Facing insidious and greedy competitors, Qin Jun uses the sea as a chessboard and fish as chess pieces, swearing to recover all the Chinese treasures lost in the deep sea. From a disgraced eldest son driven out of his home to an ocean guardian renowned far and wide, in this lifetime, he will let everyone know that this sea is his to command.