During World War I, an illegitimate son of the German Kaiser, who had been raised in the US--and is a double for the Kaiser's son, the Crown Prince--is sent to Germany as a spy in order to kill both the Kaiser and his son.

Reparto

Earl Schenck

Robert Busch / Crown Prince

Claire Whitney

Emily Busch

Percy Standing

Richard Busch

Louis Dean

The Kaiser

John Sunderland

Lieutenant Patin

Fred Hearn

Carl Von Stumpf

Charles T. Parr

Lewis Keene

Philip Van Loan

A Blue Devil

Billie Wagner

Little French Girl

Victor De Linsky

Butler