Qiufeng County, which is located in Hebei Province, has not been peaceful recently. Since half a month ago, a widow He Xiuqin was killed by bandits outside the city. On a bridge called Chiqiao in the county, "female ghosts" began to appear. One day, the county great-grandfather Chen Zhizhang passed through Chiqiao late at night after drinking, and was frightened by a "female ghost.” He ordered Guo Huan and the crowd to catch the ghosts within a time limit. Guo Huan is a town constable with justice and kindness. When the people in the small town were frightened by the "haunted" incident late at night, he stepped forward and caught the big guy Xia Chong who pretended to be a ghost. Xia Chong told Guo Huan the reason for pretending to be a ghost. It turned out that this cause of being “haunted” hides a strange murder case!...

Due to the needs of the task, three young martial arts school students- Xin Xiaojing, who is good at fighting, Cheng Tang, who is smart, and Bai Daqing, who loves parkour, are liked by Captain Zhang Lan and get recruited into the police force. Three of them sneak into the criminal's lair and carry out secret arrest. All team members have withstood all kinds of tests from the outside and the inside, and become excellent policemen....