After the death of their mother, Katie and Alex Caldwell become quite the troublemakers in the heart of Paris, France. Oliver, their father, spoils the children immensely. Vivian, Oliver’s fiancé, dislikes this fact and the children themselves.

Meanwhile, Jennifer “Jenny” Morgan applies for an executive position at Oliver’s company.  Through a series of errors, Jenny is mistakenly given the job of au pair for the children. Despite Jenny’s lack of experience as a mother, the bond between her and the children grow quickly as she gives them the love and attention they’d always craved. The children decide that Jenny is a perfect match for their father and plan to expose his fiancé’s jealous and evil ways. Their plan to replace Vivian and have him fall in love with the new au pair, Jenny, proves to be a difficult and exciting endeavor!