All of a Sudden Peggy.

Lord Anthony Crackenthorpe engages the help of a zoologist's widow to help him write a book about his favorite subject, spiders. She moves into his mansion with her impetuous daughter Peggy. Anthony's mother is very worried that her son, heir to the Crackenthorpe estate may become involved with Peggy. She asks her younger son Jimmy to keep company with the young girl.