The film revolves around a police station, and there is a prison that appears to be controversial. Now, it appears that the police are arresting criminals there and torturing them cruelly, but it may escape the criminal and take a short gun to take revenge on all the people responsible for everything that happens.
...if the storytelling is a bit loose, it's more than made up for by the splendid cinematography of Piers McGrail and O'Malley's knowing exploitation of horror tropes.
While Let Us Prey is far from original... it's an unconventional and entertaining piece of film that maintains its suspense and terror in the minds of its audience from beginning to end.