Franz Ferdinand, heir to the throne of Austria-Hungary, is kept absent from the royal court due to his dangerous political ideas. Sent on a tour of inspections and inaugurations, he falls in love with Countess Sophie Chotek.

Stage actress Marianne has decided to give up her career to marry wealthy nobleman Marquis Antoine de Fontaines. As a wedding present, Antoine gives his future wife a precious diamond necklace, which is coveted by a gang of crooks. Jean, one of them, is given the mission to approach Marianne and steal the necklace from her. The only trouble is that when he meets her, she recognizes him as the man she once loved.

A wealthy industrialist, Roger de Vetheuil, married, feels assured of aging in peace. Then appears a blackmailer who accuses him of being a usurper, actually called Jean Pelletier, a mobster well known to police. Vetheuil, judging himself slandered, refuses to listen to his tormentor and goes to the police. The man speaks. The scandal is public soon ...

An aspiring singer tries to break into films during the early talkie era. She is hired to dub the singing and speaking voice of a silent-movie favorite. Sworn to secrecy, the fill-in must stand by in silence as the star receives all the praises and plaudits.