Gao Yuxuan, a newcomer to the police force. Under the recommendation of his senior brother Shen Chong, he entered the police station as an intern. However, he encountered a serial murder case and officially entered the police station. Later, through the case of the missing treasure in the museum, he had a formal confrontation with the black group "Dark Cable", and lived under the same roof with the big boss behind the scenes! As the case deepened, a fate-changing past incident emerged in front of people. After Gao Yuxuan had a difficult confrontation with himself, he finally made a choice.