Sky just wanted to avoid her estranged grandmother with Alzheimer’s—but when she finally visits, she uncovers a haunting mystery. Surrounded by ghostly figures that vanish from memory the moment they’re unseen, Sky and her friends find themselves trapped in a terrifying cycle of forgotten horrors. Oblivium is a chilling supernatural exploration of memory, loss, and the thin veil between the living and the dead.

https://www.imdb.com/title/tt11136060/