Songwon Police Violent Crimes Unit 2 has the lowest arrest rate in the country. After their chief is demoted, the team is exiled to a closed daycare center. Enter Yubin, their new leader. Despite the team's initial distrust, Yubin and the team start to bond as they solve cases together.

Kim Dong-wookas Dong-Ban Yoo-bin
Park Ji-hwanas Moo Joong-ryeok
Seo Hyun-wooas Jeong Jeong-hwan
Park Se-wanas Seo Min-seo
Lee Seung-ryongas Jang Tan-sik
Son Eun-seoas Jang Eun-kyeong
Kim Seung-hwaas Nam Yeong-eun
Kim Ra-onas Dong-goo
Choi Gwang-ilas Kang Hui Ryong [Chief of police]