In this fourth chapter of the franchise, director Nia DaCosta moves the apocalypse inward. A young survivor navigates cult fanaticism and moral collapse amidst an infected Britain, crossing paths with figures who exploit belief as survival strategy. With performances by Ralph Fiennes and Jack O'Connell, the film examines power, illusion, and decay. Rather than raising the body count, it deepens the unease, suggesting civilization's real contagion is ideology.