In 1941, in the ancient and arduous land of China, the Hundred Regiments Campaign that shocked the world had just ended, and the frenzied invaders quickly launched a large-scale sweep. For a time, the Chinese nation was at a critical moment of life and death. In order to deal with the enemy's cold-blooded and ruthless offensive, our top leaders decided to launch the "Sirius Plan", with Li Yinlong (played by Li Chengru), the head of the Eighth Route Army Independent Regiment, as the main person in charge. In the face of national justice, people with special skills and passion from all walks of life, whether they are the Communist Party or the Kuomintang, are recruited: Liao Wu (Liu Enyou), captain of the Kuomintang action team, Chen Qiuxue (Zhou Zhi) and Wang Chunmei (Zhu Ziyan), female soldiers of the independent regiment, Wu Qingqing (Yang Jinglin), female hero of the Jianghu, Li Hongling (Ji Zhenzhen), female leader of the Qinglong Gang, Cheng Qinghong (Ma Yanting), a top student of physics, and others have joined one after another, and launched an arduous war with the invaders headed by Tokugawa Yukinosuke (Sun Yimu), general of the Japanese invading army stationed in Tianjin...