Spy War: The Little Agent’s Great Reversal is a military novel set during the War of Resistance Against Japan, written by Si Ruolan. It tells the story of Qin Tian, a military academy cadet who accidentally transmigrates to China in 1938 and becomes the director of general affairs at the Secret Service Bureau. Though he seems carefree and irreverent, he is actually an agent who has spent years undercover in enemy territory, working for the Chinese Communist Party. Fighting side by side with his wife, Gu Shumei, he faces life-and-death trials. Their passionate resistance to the Japanese captures both the love and the patriotic convictions of people in that era.