Tony and his dance partner/wife Gaby headline a Paris musical. Tony becomes the unwilling target for the attentions of performer Yvette. She is later murdered with the dagger used by Tony and his wife in their act, and Gaby is accused of the crime.

With the police on their tail, a gang of New York criminals decided to relocate to London where they plan a major robbery on a department store.

A Smithfield porter becomes a butler, and later finds himself heir to a fortune.

A well-known actor is murdered. Another performer becomes an amateur sleuth so she can prove her sister is innocent of the crime.