A perfumed message provides the only clue for a blind detective bent on clearing a man accused of murder.

Edward Arnold
as Capt. Duncan Maclain

Frances Rafferty
as Jean Hampton

Ray Collins
as Phillip Treadway

Paul Langton
as Barry Gifford

William Phillips
as Marty Corbett

Thomas E. Jackson
as Insp. Delaney (as Thomas Jackson)

Morris Ankrum
as Ferris (henchman)

Robert Lewis
as Stormvig

Francis Pierlot
as Kossovsky

Sondra Rodgers
as Helen Roberts