In 1936, the copper produced by the Dong family in Shanxi became a strategic material that must be fought for by military strategists, so the Japanese army launched the "Sakura Plan". Dong Shouwang, the second son of the Dong family, robbed the rich to help the poor at the critical moment, but inadvertently destroyed the underground party organization's plan to buy copper. Qi Ying, an underground member of the Communist Party of China, was ordered to complete the plan through his friendship with Dong Shouwang. Dong Shouwang assisted Qi Ying with all his strength because of his admiration for Qi Ying, but in the process, he found that Qi Ying's father Ma Qilong and others were directly related to Dong's father's death. He fell into the trap of the other party in anger. Qi Ying and Dong Shouwang's spiritual godfather Guan Jianyun risked their lives to rescue him, and Guan Jianyun was killed. Dong Shouwang put aside his family feud in grief and assisted Qi Ying in obtaining copper and guns and ammunition for the anti-Japanese advance team. The two gradually went from enemies to relying on each other, went through hardships, and made great achievements. In the end, they had to blow up the mines and arsenals. They would rather stay away from their hometown than become slaves of a conquered country. Under Qi Ying's guidance, Dong Shouwang finally grew from a bohemian dandy to a resolute anti-Japanese fighter.