Lynn, a single millionaire, raises daughter Dottie. Shirley Lane hires Mara Marsh as nanny. Mara, greedy, mistreats Dottie. Mara brings son Chandler Zeller to match him with Lynn, aiming to seize assets. Lynn tolerates, but Mara and Chandler scare Dottie, disrupt Lynn's life, coveting her property. Lynn stops compromising, collects evidence, kicks them out. Lynn and Dottie return to stable life, understanding boundaries protect against greedy acquaintances.