During the Chongzhen period of the late Ming Dynasty, the postman Lu Zhuifeng had the power of "traveling thousands of miles in a day" and was the "Zhuifeng" who conveyed the highest military intelligence. One day, he received a top-secret firearm map related to the national destiny, which must be delivered to the capital within seven days. On the way, he encounters an unprecedented pursuit of a "time police" team equipped with strange weapons and advanced tactics. The leader, Leng Feng, claims to be from the future. If the secret letter is delivered, it will cause a catastrophic historical deviation.
