Boston Blackie and the Law (1946)

Boston Blackie, ex-convict and amateur magician, is doing his act at a prison-for-women, and an inmate takes the opportunity to do her own disappearing act while Blackie is doing his. Held as an accomplice, Blackie gets away and starts the search to find the escapee, and her ex-husband who was involved in the crime for which she was sentenced to prison.