Based on the viral internet phenomenon, Kane Parsons, director of the eponymous series, presents a film. A suffocating new kind of horror where the boundary between reality and a terrifying alternate world gradually blurs.

When furniture salesman Clark discovers a hidden portal in the basement of his store, he becomes trapped in another reality; the so-called Backrooms. His therapist tries to rescue him and uncovers a mysterious labyrinth of abandoned office spaces that not only seem infinite but also keep changing. As time fades, something inhuman lurks just out of sight.