Looking Glass (2018)

After wasting 5 minutes to decide which movie to watch, my choice fell on one of the several movies Nicolas Cage has done this year so far, Looking Glass, because it was listed as a thriller and it has Robin Tunney as I was interested in seeing her other than playing Theresa Lisbon in CBS's The Mentalist. 

After losing their child, a couple, Ray (Nicolas Cage) and Maggie (Robin Tunney), buys an old motel in the desert looking for a new beginning. While exploring the motel, Ray discovers a two-way mirror that allows him to see what is happening in one of the rooms --things such as prostitute sex and lesbian encounters-- and he starts spying the occupants. Until he witnesses a murder and finds himself in a cat-and-mouse game.