In September 2015, Gayle Newland stood trial accused of sex by deception. It was alleged that she created an online identity as a man and used this character, Kye Fortune, to lure another woman into a sexual relationship, which was consummated repeatedly with the assistance of a blindfold and a prosthetic penis. The woman believed she was having sex with Kye until one day her ring caught on his hat and she felt long hair.
The first thing you notice about undertone is how quiet it is; not just in its audio mix, but in how it's shot - primarily steady wide shots that slowly pan across empty rooms, allowing your eyes to frantically scan for something amiss. It's an understated form of filmmaking that allows for the movie's scares to hit all that much harder.