When a dangerous secret resurfaces, dark web former boxer Gun-woo finds himself caught in a deadly battle against Baek Jeon, a powerful and unpredictable man willing to do anything to get what he wants. As old enemies return and new alliances are formed, Gun-woo must protect the people he loves while uncovering the truth behind a mystery that could change everything. In a world ruled by money, power, and betrayal, survival comes at a cost.