Shen Lang, a young man recently discharged from the military, gives up a high-paying job in the city and returns to his hometown to lease an abandoned reservoir, rebuilding his life from scratch. With courage, skill, and perseverance, he brings the lifeless waters back to life, catches enormous fish weighing over a hundred jin, and uncovers the secret of a dragon vein beneath the reservoir. Facing skepticism and pressure from powerful investors, he repeatedly rises to the challenge, ultimately protecting his hometown and finding success and love as he transforms a desolate reservoir into his own paradise for monster-sized fish.