In the Northeast in 1938, Su Yao, an Orion girl who was familiar with the mountains and forests, was developed as a spy by the Anti-Japanese Alliance. She pretended to be a peddler to deliver food to the Anti-Japanese Alliance and pass on information about the Japanese army's "clearance campaign". Once she encountered a Japanese suppression team, she relied on traps and mountainous terrain to escape capture, and also rescued the injured anti-resistance captain Xiao Zhan. The two led the anti-alliance forces and ambushed the suppression team on a snowy night, seizing a large number of weapons and making the base area temporarily safe.
