It tells the story of Eun Dae Gu, Eo Su Seon, Park Tae Il and Ji Guk - otherwise known as the P4 - who are the new recruits in the violent crime unit at Gangnam Police Station. These rookies are neither enthusiastic nor passionate about their new jobs and have joined the crime squad for varying but unbefitting reasons. They are led by an erratic and hot-headed Seo Pan Seok, who
