During the Anti-Japanese War, in a northern rural village, there was a young boy named Xiao Niu. Under the leadership of the Party, he participated in the struggle against the enemy. One time, Uncle Ma, a messenger for the Eighth Route Army, was delivering intelligence to the guerrilla forces when he encountered Japanese soldiers and puppet troops on the road. Xiao Niu cleverly diverted the enemy, allowing Uncle Ma to escape danger. Based on the intelligence delivered by Uncle Ma, the guerrilla forces formulated a plan to seize the enemy's weapons. Xiao Niu accepted the mission assigned by the guerrillas to act as a "guide" for the enemy. He skillfully led the enemy deep into the reed marshes, right into the guerrilla ambush circle. Working together with the guerrillas, they captured a large batch of weapons from the Japanese soldiers and completely wiped out the enemy forces.