20 Hidden Horror Gems On Netflix

After brutally murdering his immediate family, two detectives must figure out why Kim Byong-Gook - a man who wouldn't hurt a fly - has suddenly snapped. Since he's disappeared into the sunset, this doesn't seem like such a pressing issue despite being obviously unsettling, until the law discovers Kim has returned to his office building and lies somewhere in its walls.

Suddenly that paperwork doesn't feel so important anymore, does it?

A South Korean slasher movie that isn't afraid to dig its teeth in, Office floats between showing its characters as good, bad, and explicitly violent, leaving crumbs for its viewers to pick up and piece together in the wake of its troubled protagonists. If you like murder mystery, then this has plenty of both.