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After the July 7th Incident, the Japanese invaded North China and then entered the Huanggangshan gold mines. With the outbreak of the Pacific War in 1941, the Japanese invaders also tightened their predatory mining of the Huanggangshan gold mines due to the stretched front line and lack of domestic resources. The miners were killed at the slightest dissatisfaction. At this time, Yan'an was short of funds, and superior leaders ordered the Eighth Route Army and the underground party to try to mine and transport the gold from Huanggang Mountain. The struggle between the enemy and ourselves has fallen into a stalemate. Guo Xiaodong, a young underground party member, was ordered to lurk in the Huanggang Mountain gold mine. He cooperated with Ma Wanqi, the wealthy owner of Huanggang Mountain, and used his hidden hundred rifles and ammunition to ambush the Japanese and puppet troops. The Japanese and puppet troops became angry and tightened their control over the Huanggang Mountain gold mine. Guo Xiaodong designed to capture Lu Dacheng and rescue Ma Wanqi and his daughter. Kuomintang die-hard Wan Jiaming turned to the Japanese army out of anger at Ma Wanqi's daughter's defection. Guo Xiaodong struggled to mediate... A battle for gold medals mixed with emotional entanglements intensified.