In North China in 1942, I am Shen Yan, a "lone wolf" agent lurking in the Wang Puppet Intelligence Department. The Japanese army secretly promoted the "germ warfare plan", and I risked my identity to work around the enemy camp. The pen pistol is my weapon, and it is also the key to hiding intelligence - the body of the pen contains microfilm, and the tip of the pen shoots an anesthetic needle. Su Qingyue, a traffic officer of the underground party, met with me in teahouses and markets to help me deliver information. Matsui, the head of the Japanese military intelligence section, was suspicious and cunning, and set traps many times to test my identity. From encrypted intelligence to thrilling connections, from evading pursuit to assisting the Eighth Route Army, I can only walk on the edge of a knife with the belief that "I would rather die than be a slave to the country's subjugation", vowing to destroy the Japanese army's bacterial weapons arsenal and protect our country.
