Eun Dae Gu, Eo Soo Sun, Park Tae Il and Ji Gook are four new recruits of the violent crime department at Gangnam Police Station, Seoul. But all of them join here due to unbefitting reasons instead of enthusiasm and passion with this job. They are under the management of Team Leader Seo Pan-Seok, who gradually trains them from imcompetent recruits to real police officers.