After growing up as an orphan, Millie Longfellow is determined to become the best nanny the East Coast has ever seen. Everett Mulberry has quite unexpectedly become guardian to three children that scare off every nanny he hires. About to depart for Newport, Rhode Island, for the summer, he's desperate for competent childcare. The employment agency gives them one last chance-- with each other. As Millie falls in love with her mischievous charges, Everett focuses on achieving the coveted societal status of the upper echelons-- while investigating the suspicious circumstances surrounding the death of the children's parents.