Ghost in the Cell

Something unseen is tearing through a notorious prison, and the bodies pile up faster than anyone inside can explain. The clever move is what the killing does to the ecosystem: rival gangs and crooked guards, people who have spent years perfecting the art of hating each other, are forced into a truce nobody wants. That turns the film into a pressure cooker where the horror comes from two directions at once, the invisible thing in the corridors and the very visible knives that never quite go away.

Locked-room dread and brutal, escalating set pieces are the draw, so this suits horror viewers who like their scares confined, bloody and claustrophobic rather than atmospheric and slow. The pacing tightens as the walls close in, and the shifting alliances give the carnage a shape beyond simple body count. Anyone who enjoys prison thrillers, siege horror, or stories where survival forces enemies into the same room will find this an easy, gripping watch.