In Bab's Burglar, we were introduced to boarding-school brat Bab Archibald (Marguerite Clark). In Bab's Diary, Bab comes home for the Christmas holidays. Given to fabrications, Bab has been keeping a diary in which she describes and imaginary boyfriend named Harold Valentine. Imagine what happens when a real Harold Valentine (Jack O'Brien) shows up as her parents' house guest. Like Bab's Burglar, Bab's Diary was based on a story by Mary Roberts Rinehart. ~ Hal Erickson, Rovi