A group of criminals call themselves the "Northern Detachment". They commit several major crimes on the Beijing-Guangzhou Railway. The Public Security Bureau sends Ma Xiaolong after them.
Li Xida
宗民
Diana Lin Xiaojie
梅容
Wang Ping
胡飞
Dong Honglin
马小龙
Lijun Sun
一把手
Ai Liya
秀芬
