During the occupation of the Republic of China era, Wu Zheng, a retired special forces soldier, is invited to join the police force and partner with veteran detective Tao Li. Together, they unexpectedly unlock a spy-war infrastructure-building System. While navigating enemy agents and solving a string of linked cases, they pass on vital intelligence and secretly establish covert arms-manufacturing lines and repair civilian infrastructure. Amid a tight blockade, they lay a solid foundation for the resistance behind enemy lines.
