Haiden Buxley is (not) dealing well with the sudden disappearance of their roommate and best friend, Riley Jenkins. Told through a series of voicemail calls and audio recordings, Haiden starts to realise that there's more to Riley's vanishing act than meets the eye. On Riley's end, she's writing letters she will never send to Haiden, trying to explain why she disappeared and the danger the two friends are in…