Posing as an aristocrat to crash a party, a composer stumbles upon a gang of jewel thieves working unnoticed upstairs.
Cast

Lupino Lane
Adolphus Miggs
Jean Denis
Bubbles O'Hara
Kathleen Kelly
Peggy Sylvester

Wallace Lupino
Robbins
Margaret Yarde
Margaret Yarde

Arthur Rigby
Sir Henry Sylvester

Syd Crossley
Curtis
Reginald Long
Captain Hindlemarsh
Fred Leslie
Kabitzer
Hal Gordon
Yokel
Harold Brewer
Baritz

Arthur Clayton
Sir Arthur Paterson

Phyllis Clare
Night Club Singer
Alvin Saxon
Night Club Bandleader