Mariah feels abandoned after seeing her friends’ rooftop party online. Mysterious messages lure her to the same rooftop, where a strange woman in a red coat waits. The woman claims Mariah once called her during a lonely night years earlier. Her friends at first doubt her, but when they witness the woman too, fear sets in. The woman tempts Mariah to sit in an empty chair meant for her, promising she’ll never be left behind again. Mariah refuses, choosing real friendship over the haunting shadow of her loneliness. The woman fades, and Mariah finally takes her place among the living.