In the Northeast in 1938, Su Yao, a young Orion girl, was developed as a "secret agent" by the Anti-Japanese Alliance because she was familiar with the mountains and forests. She disguised herself as a "seller" to deliver food and intelligence to the Anti-Japanese Alliance. She met the Japanese "suppression team" and escaped pursuit by relying on the mountainous terrain. She also rescued the injured anti-alliance soldier Xiao Zhan. In the end, Su Yao led the Anti-League, and in the "Snowy Night Ambush", annihilated the Qing Dynasty team and secured the Anti-League base.
