We Know the Devil follows three teenagers, Venus, Jupiter and Neptune, members of a summer program called the Summer Scouts for misbehaved children. After upsetting one of the councilors, The Bonfire Captain, the three teens, also known as Group West, have to spend a night in the loneliest cabin. The game follows the three as they deal with the difficult dynamics of a three person group, complicated feelings about each other, and meeting the Devil herself.