The camera keeps Kiera Allen in center frame and lets the edges of the house crowd in. That is the formal key to Run — Aneesh Chaganty’s 2020 Hulu thriller builds its horror not from jump cuts or score swells, but from the accumulation of things the frame refuses to show.

Chloe Sherman is a teenager who uses a wheelchair, lives in a remote house, and has been homeschooled her entire life by her mother Diane, played by Sarah Paulson with a controlled sweetness that registers as unease before you can name why. The setup is economical: a house, a routine, an orange pill bottle. Chloe picks it up. The label has her name on it. The drug listed is not something any doctor prescribed for her.

What follows is a procedural of escape — Chloe trying to leave a house designed, she begins to understand, for exactly the opposite purpose. Chaganty, whose debut Searching (2018) built tension through a laptop screen, here builds it through a body in space: what the chair can reach, what it cannot, how high a drop she can survive. Hillary Spera’s cinematography never cheats. Every frame is accurate. The film just makes sure you arrive at conclusions slightly before Chloe does.

Sarah Paulson does the opposite of her American Horror Story work here: no hysteria, total restraint. The menace in Diane Sherman is in what she does not do — the moment she turns away, the pause before she answers a direct question, the casual precision with which she handles Chloe’s medication. Kiera Allen, in her feature debut, carries the film’s physical premise without ever announcing the effort. The wheelchair is not a symbol. It is an engineering problem Chloe has to solve, room by room.

Run benefits from knowing exactly what it is — a single-location thriller with one revelation to deliver and the craft discipline to delay it. Its limitation is also its engine. What Chaganty achieves is making the viewer feel the trap from the inside rather than observe it from a diagnostic distance. That distinction is rarer than it sounds.

On the narrow ground it claims, Run delivers. Aneesh Chaganty made a tight, controlled film that trusts its lead performers completely — and in casting Kiera Allen, a real wheelchair user, gave the film’s central mechanism an honesty that most thrillers in the genre bypass.