Everyone is transported into a world of maritime survival, where they must build their own vehicles from scratch and venture into unknown waters. At the very beginning, Lin Bei unexpectedly forms a contract with the mythical-level colossal beast Xuanwu, transforming its vast turtle shell into a fully equipped mobile maritime city-state known as Xuanwu City. With Xuanwu's immense power and his own strategic brilliance, he rescues a player in distress named Xiao Juzi, recruits pirates who have regained their sanity to expand his forces, explores dangerous waters for resources, and eliminates hostile factions that deliberately provoke him. Along the way, he gathers rare materials, unlocks advanced blueprints, and continuously upgrades both his vehicle and his own cultivation. Leading the residents of Xuanwu City, he steadily expands their territory across the perilous, boundless ocean while gradually uncovering the deeper secrets of this survival world.