Paul Craig is an aviator-inventor who becomes blind due to overwork. He stumbles into a room as a person is being killed by foreign agents - who decide to let Craig live because he cannot identify them. The murder is part of a plot to overthrow the monarchy of fictional Ruvania.

Walter Bentley
as

John Bruce
as

George Bryant
as Carlo Gelmini

Nellie Ferguson
as

Harry Halley
as

Eric Harrison
as

Grace Savieri
as Angela Scardon

Cecil Scott
as

Arthur Shirley
as Paul Craig

Carlton Stuart
as