By the end of 1942, the Japanese aggressors and the Chinese army had a fierce battle in Yunnan, the Chinese army suffered heavy casualties, two thousand or three thousand people were trapped in the mountain, need supplies and rescue. In the Anti-Japanese National United Front under the banner of the Communist Party and the Kuomintang sent veteran soldiers and able captains, jointly organized by a mysterious caravan, delivery of relief supplies. Guerrilla experts, Communist Kang Jian was, from the army chose a few soldiers of their own, find familiar distance high Wangkui caravan head, a caravan, along with in-depth Yunnan high mountains and lofty hills, looking for trapped Chinese army. After several ups and downs, to overcome the obstacles laid siege to Japanese and spy, Kang Jian finally led the caravan to complete the task, dig out the spy " God ", thousands of Chinese army life preservation.