Eighth Route Army scout Zhao Tiezhu intercepted the Japanese "Plan C" secret message in the Taihang Mountains, and the content pointed to the arsenal in the base area. Disguising himself as a puppet soldier, he broke into the Japanese intelligence station and cooperated with the female traffic officer code-named "Tit". He discovered that "Plan C" was actually a trap to lure the enemy, and the real goal was to destroy the Eighth Route Army's underground communication lines. Zhao Tiezhu used his plan to lead the Japanese army into the ambush circle, but after the victory, he found that "Tit" had been killed by a traitor.
