Sergeant Yoon Seunghyun is transferred to the 12th District's Central Civil Affairs Department. The young policeman meets an experienced partner, a strong mercenary and a charming hacker. Forming a team, they investigate the murder of a young girl. However, the deeper they dig into the case, the more mysteries emerge. Immerse yourself in criminal intricacies by choosing one of three ways of plot's development. Solve the case, together with an extraordinary team and uncover the darkest secrets of the alternative world of the Intersection.