The film is based on the secret line of communication established by the Red Fourth Front Army and the Kuomintang leftist generals in May 1933. It tells the story of the patriotic general Yang Hucheng who sent a special envoy Feng Zhi to the headquarters of the Red Fourth Front Army in northern Sichuan
| Actor | Role |
|---|---|
 Shi ChaoFeng Zhi | Feng Zhi |
 Hao AiliLuo Yujiao | Luo Yujiao |
 Cui ZhenzhenYang Linghua | Yang Linghua |
 Zhao ZhonghuaBoss | Boss |
| WWang XinzhongHuang Longbiao | Huang Longbiao |
 Li XiaopengShen Weiru | Shen Weiru |