Song Chao, Liu Haiyang, and Huang Tiancheng were classmates in the police academy. Song Chao was expelled for making a mistake, and his dream of becoming a policeman was shattered. Liu Haiyang and Huang Tiancheng successfully graduated and became real policemen. Song Chao, who was expelled from the police academy, was entrusted by Liu Haiyang's father Liu Shouyi to sneak into Guanyu Group to investigate an arson case. When Liu Shouyi met with Song Chao, he was killed by Hu Long, a subordinate of Guanyu Group. Hu Long was shot and wounded by Liu Shouyi during the crime and fled and his whereabouts were unknown. Song Chao was regarded as a murder suspect and was forced to embark on the road of escape. Liu Haiyang and Song Chao are not only classmates, but also his wife Chu Jie's ex-boyfriend. New and old hatreds made Liu Haiyang swear to bring Song Chao to justice. At this time, Song Chao was also actively investigating the truth to get rid of the crime, and found his former classmate Huang Tiancheng for help. Unexpectedly, he fell into a more dangerous situation during the pursuit. When his life was hanging by a thread, they discovered that all this was done by a woman named Hu Ziwei, and behind Hu Ziwei was a greater conspiracy and crime. Light and darkness, justice and evil, are confusing and interconnected, and in the end "the devil is one foot high, but the Tao is ten feet higher."