Singing Marseilles docker Joe is hired by wealthy English couple, the Oliphants, to find their missing son Gerald. When Joe finds him, he learns Gerald escaped of his own will and takes him to stay with a local singer, who offers a refuge from his repressed white parents.
A young woman designer goes to London to further her career, but things are complicated when her invention is a success.
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.
