Murderer Harold Dunlap (Charles Russell) is trapped in a small town when a flood washes out all the bridges. He has just killed his unfaithful wife. As Dunlop disposes of the body, he is witnessed by a young boy who becomes the madman's next target.
Inspired by the radio show of the same name and reminiscent of both Shadow of a Doubt and The Night of the Hunter, Inner Sanctum features a tart and witty script crammed with lascivious one-liners and shadowy photography. A fluid camera prowls classic noir nightscapes - a decrepit boarding house, the banks of the river, a deserted train station and, most eerily, the park on the edge of the wood.