In the first month of the thirty-second year of the Jiajing reign, Japanese pirates run rampant along the southeastern coast. The protagonist is reborn with a "Modern Weapons Exchange System," stocked with every kind of weapon and vehicle from the Cold War to the modern era, from pistols to tanks. Each time he kills a pirate or completes an anti-pirate mission, he earns "military merit points," which he can use to exchange for weapons and ammunition, military technology, and special operations knowledge. The System has a technology tree that must be unlocked one level at a time, progressing from small arms to heavy weapons and then to modern tactical systems.