I Went into A24's $400 Million Horror Hit 'Backrooms' Knowing Nothing — And It Was the Best Way to Watch It on HBO Max

Introduction to A24's Massive Hit

A24's highest-grossing film to date, the surreal horror flick "Backrooms," has finally made its way to HBO Max. Racking up nearly $400 million globally, it stands as one of the biggest cinematic hits of the year. Along with blockbusters like "Obsession" and "The Odyssey," it helped turn the summer theatrical window into the busiest season cinemas have seen since the pandemic.

The Internet Lore That Inspired the Nightmare

If you have ever fallen down the internet's weirdest rabbit holes, chances are you have encountered the backrooms. The concept originally began as a simple, unsettling photo posted online depicting an empty department store under renovation. This eerie, liminal expanse hooked itself firmly into the collective consciousness of the internet, eventually spawning countless viral videos, indie games, and elaborate fan theories about what might be lurking just out of sight in those endless yellowed halls.

Surpassing Expectations: From Slender Man Fails to Cinematic Artistry

After the massive misfire that was 2018's "Slender Man," many horror fans were understandably skeptical about another piece of internet lore getting the big-screen treatment. However, "Backrooms" defied all expectations, serving up a masterclass in tension. For his feature directorial debut, Kane Parsons displays an artistry and vision that are truly remarkable. The film's composition, pacing, and mood were so hypnotic that many viewers, including critics, found themselves returning to theaters for repeat viewings. Now that it is streaming on HBO Max as part of the September lineup, an even wider audience can experience the bizarre terror firsthand—and the best part is that you do not need to study any deep lore beforehand to enjoy it.

Plot Overview: What is 'Backrooms' About?

How do you describe a dream? Take that dream, coat it in unnervingly sterile yellow hallways, infuse it with the constant dread of being watched, and you have the core essence of "Backrooms." The story follows Clark (played by Chiwetel Ejiofor), a freshly divorced furniture store owner struggling to keep his business afloat. One fateful night, he stumbles upon a hidden doorway in his store's basement, leading to an impossible, seemingly infinite labyrinth of interconnected rooms that completely defy physics and reason. What starts as an obsessive mapping project quickly spirals out of control as Clark realizes he is not the only lost soul wandering these halls.

Concerned for his rapidly deteriorating mental health, Clark's therapist, Mary (Renate Reinsve), undertakes a wellness check and ends up crossing the threshold into the exact same terrifying hidden world. The twisted corridors have evolved, becoming home to something deeply sinister. Worse still, Clark's bitterness—amplified by the corrupted power of the space—turns him into a manic figure playing house as his grip on sanity completely unravels.

Why You Should Stream 'Backrooms' on HBO Max

If the concept of being trapped in an endless, fluorescent-lit maze sounds like your worst nightmare, then "Backrooms" is an absolute must-watch. The film leans heavily into atmospheric horror, extracting maximum dread from drawn-out chase sequences, ambient soundscapes, and surreal visual cues. Parsons establishes a deeply unsettling tone right from the opening frame, making Clark and Mary feel less like explorers and more like helpless prey being stalked through a shifting labyrinth.

While the movie intentionally avoids holding your hand or spelling out every detail, leaving plenty of room for viewers to fill in the blanks with their own theories, it rewards patience. If you are willing to let the narrative drag you down its cerebral and horrifying rabbit holes, you are in for an unforgettable cinematic trip.