Philip Stenning is a commercial pilot, trained during the First World War. After his engine fails, he crashes and is rescued by an escaped convict, Denis Compton, who turns out to have been framed for embezzlement by his Italian half-brother, Baron Rodrigo Mattani, who is smuggling drugs into England.

Philip Stenning is a commercial pilot, trained during the First World War. After his engine fails, he crashes and is rescued by an escaped convict, Denis Compton, who turns out to have been framed for embezzlement by his Italian half-brother, Baron Rodrigo Mattani, who is smuggling drugs into England.