Office (Korean: 오피스) is 2015 South Korean thriller film directed by Hong Won-chan and written by Choi Yun-jin and starring Go Ah-sung, Park Sung-woong, and Bae Seong-woo. It is about a detective trying to figure out why a mild-mannered man has killed his family and is targeting his co-workers. The film premiered at the Midnight Screenings section of the 2015 Cannes Film Festival.