In the abandoned mansion of Blackthorn Hill, where the walls are lined with mirrors, strange things have begun to happen. The locals speak of a mysterious black cat with glowing eyes that appears in the reflections, but never in the room itself. Eloise, a young woman fascinated by the house’s eerie history, decides to investigate. Upon entering the mansion, she realizes that the mirrors show not just her reflection, but alternate realities where time, space, and life itself are distorted. The black cat appears in every mirror, its glowing eyes guiding her deeper into the house's secrets. But as she follows the cat from mirror to mirror, she discovers that the cat is not just a watcher, but a guardian of the worlds beyond the glass. Soon, Eloise must decide whether to stay in her own reality or cross into one of the mirrored worlds, where the line between life and death is blurred.