The Monroes' elderly neighbor, Mrs. Plumlee, has started having random and mysterious accidents. Despite her insistence that Maddie mind her own business, she just can’t help Inspector Momming. Someone must be responsible - could it be the destitute son and daughter-in-law? The new maid? The ghastly interior decorating? Maddie’s busybodying unearths a shattering secret - which everyone seems to be okay with in the end.