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.

Gerald du Maurier
as Captain Matt Denant

Mabel Poulton
as The Girl in Hyde Park

Ian Hunter
as William Brown, the Plainclothesman

Gordon Harker
as Convict 272

Edna Best
as The Gentlewoman In Bed

Horace Hodges
as The Gentleman at Stream-side

Lewis Casson
as Landowner Browning

Madeleine Carroll
as Dora

Marie Ney
as Grace, Dora's sister

Austin Trevor
as The Vicar