9.5 (19,074 ratings)
Four rookie detectives – Eun Dae Koo (Lee Seung Gi), Eo Soo Sun (Go Ara), Park Tae Il (Ahn Jae Hyun), and Ji Kook (Park Jung Min) – each with their own troubled past, are thrust into the chaotic world of the Gangnam Police Station. Their hot-headed, by-the-book chief, Seo Pan Seok (Cha Seung Won), wants them gone, but a dark secret binds them all: a 15-year-old murder case that connects Pan Seok to Dae Koo, whose mother was killed. As they navigate cases, mishaps, and budding romances, they slowly uncover the truth behind the tragedy that shaped their lives. Will they find justice, or will the past consume them?