A working class family move into a new condo purchased after 11 years of hard work. They throw a housewarming party to show his co-workers when overnight a heavy downpour creates an extremely deep sinkhole that engulfs the entire building.
The ‘Beast Cop’ Ma Seok-do heads to a foreign country to extradite a suspect, but soon after his arrival, he discovers additional murder cases and hears about a vicious killer who has been committing crimes against tourists for several years.
On September 4, 1984, democracy movement leader Kim Jong Tae (Park Won Sang) is arrested and taken to an infamous interrogation facility in Namyeong-dong. For the next 22 days, he would be cruelly and continuously tortured in all manners by interrogators intent on forcing him to confess to communist collaboration.