Swallow in the Shadows

Communist agent Tong Zhiyuan infiltrates Headquarters 76 under the codename "Swallow." Meanwhile, Qin Guichuan, an agent of the Military Affairs Commission, has also infiltrated Headquarters 76. At first, the two keep their guard up and distrust each other. But after Tong Zhiyuan saves Qin Guichuan during a mission, their relationship undergoes a subtle change. With a powerful enemy before them, they work seamlessly together, matching wits and courage against their foes. They foil the Japanese army's "8.19 Plan" to launch biological warfare in China. In the end, Qin Guichuan receives a secret order from the Military Affairs Commission to eliminate "Swallow." What will he choose to do...