During the fall of the Republic of China, retired soldier Wu Feng and police detective Wei Zheng infiltrated into enemy-occupied areas. While carrying out espionage missions to deliver intelligence and remove enemy strongholds, they also cracked many unsolved cases such as serial assassinations and theft of secret messages. Relying on the practical experience of special forces and the meticulous reasoning of detectives, they tore through the intelligence blockade of the enemy and puppets and protected the key secrets of underground organizations.
