Office

Kim Byeong-gook works as a section chief at a company. He is a family man and reliable with at his job, but, one day, he kills his entire family and disappears. Detective Jong-hoon investigates the murder case and talks with Byeong-gook's co-workers at his office. His colleagues though are not very forthcog with details. Besides, Lee Mi-rye, who was very close with Byeong-gook, seems to be hiding something. What in the office really made Byeong-gook go mad? Is he still in the building?