Infinitum: Subject Unknown ratings (Movie, 2021)

Jane (Tori Butler-Hart) wakes up in a strange attic, bound and tied to a chair, she has no idea where she is or who she is. As panic sets in, she sees a violent bright light flash in front of her eyes and once again she wakes up; same situation as before, an exact repeat. Voices bleed in from another time and place, giving Jane clues to what might be happening to her. She escapes and embarks on a journey through an empty parallel world leading her to a Quantum science research laboratory in the middle of nowhere. There she discovers tapes from Dr Charles Marland-White (Ian McKellen) and Professor Aaron Ostergaard (Conleth Hill) and their experiment involving human test subjects.