Ann Casson

A gang of jewel thieves hides out in an abandoned London house after a robbery, unaware that a detective is among them in disguise.

When Matt Denant (Gerald de Maurier) finds himself wrongly imprisoned for manslaughter, he takes an opportunity to escape from jail during a foggy day and is forced to rely on the goodwill of local people to remain a fugitive of the law.

When a motorbike gang kills an occultist, the evil spirit he was summoning inhabits a damaged bike. The bike is then bought and restored, but reveals its true nature when it tries to exact vengance on the gang, and anyone else who gets in its way.

The Frictions of a suburban family come to boiling point.