In 2024, Su Yan, a special operations staff officer in the southern theater, encountered an accident during an anti-terrorism drill and was involved in the battlefield of the "Autumn Sweeps" in the Shanxi-Chahar-Hebei base area in 1941 by an abnormal arc. From a well-equipped modern battlefield to falling behind the anti-Japanese enemy lines with backward weapons and dangers, he relied on the tactical dagger he carried, two shock bombs, and solid knowledge of modern tactics to save children in the desperate situation of the Japanese army massacring the village. He accidentally met Lu Qingshan, an underground party traffic officer, and joined the anti-Japanese team under the codename "Guiyan".
After that, Su Yan formed a core team with Lu Qingshan and radio operator Shen Ruowei. They were in danger but failed repeatedly: when he was hunted by the Japanese army at the mountain temple, he used shock bombs to create a breakout opportunity and watched the villagers sacrifice themselves to protect everyone; in order to destroy the Japanese arsenal, he disguised himself as a Japanese soldier. The losing team sneaked into the stronghold and deployed explosives with engineering thinking, but due to the details being exposed, he started a life-or-death shootout with the enemy; when performing the task of escorting intelligence to Peiping, he formulated a precise grouping plan to raid the train station, but when Japanese reinforcements arrived, he was forced to part ways with Lu Qingshan, who was shot and covered.
As a time traveler, Su Yan's modern tactics and knowledge have become sharp weapons in the struggle behind enemy lines, but he always respects history - he does not attempt to rewrite the war situation, but only acts as a "participant", using every precise shot and every tactical layout to protect his comrades and people around him. In a battlefield behind enemy lines full of spies, he not only had to deal with cunning Japanese troops and traitors, but also had to face the identity confusion and mission choices of travelers. In the end, tempered by blood and fire, he grew from a modern soldier to one who integrated into the torrent of the Anti-Japanese War.
