Intrigue(1917)

While traveling to meet her sweetheart, Richard Carr, in the capital of the Grand Duchy of Bonaluria, Peggy Dare's train compartment door is thrust open and a little boy is thrown at her feet. Peggy is so taken with the child, who tells her that his name is Manouche, that she looks after him. She foils an attempt to kill Manouche, before arriving in Bonaluria where she learns from Richard that the boy is really the Grand Duke.