Someone is stealing priceless paintings from the great museums of the world and replacing them with nearly flawless forgeries. Leonardo da Vinci's "Madonna and Child" is being shipped to London's Tate Gallery for a special exhibition, and Paul Mitchell is assigned to protect it. Upon the painting's arrival, Paul realizes it has been switched. Eager to collect the museum's $50,000 reward, he teams up with Mary Mason, a Tate employee, to recover the original.
Dennis O'Keefe
as Paul Mitchell
Coleen Gray
as Mary Mason
Hugh Williams
as Sir Richard Aldingham
Guy Middleton
as Smith
John Laurie
as Henry Mason
Gerald Case
as Randall
Seymour Green
as Weston
Eliot Makeham
as George
Stanley Van Beers
as Cartwright
Ellen Pollock
as Miss Fossett
Morris Sweden
as Pettigrew
Dora Bryan
as Barmaid
