After her humiliated husband kills himself, an embittered pregnant widow loses her child, and embarks on a mission of vengeance against a woman and her family. Peyton Flanders seemed to be the perfect nanny, but secretly she was out to wreck the lives of the family she was supposed to be helping. Before becoming the nanny, Peyton had a miscarriage, and blamed it on Claire (the mother). Claire suspects nothing, having never met Peyton before.