The psychological science-fiction horror story follows Clark, played by Chiwetel Ejiofor, a struggling furniture store owner and interior designer whose life takes a terrifying turn after he discovers a dimensional crack leading into an endless labyrinth of eerie yellow rooms illuminated by flickering fluorescent lights. When Clark disappears inside the mysterious alternate reality, his therapist, Dr. Mary Kline, portrayed by Renate Reinsve, goes into the supernatural maze in a desperate attempt to bring him home.
