At home, Melissa is a whiner and a loser, but in her own agency she turns into a stunning Darling, a supernanny for her male clients who run to her for help from all over London, knowing that she will help out of any trouble. Boyfriend Jonathan invites Melissa to New York for a vacation, with the condition that her other self, the blonde Darling, stays in London. With a heavy heart, leaving the agency for her shameless friend and creepy sister, Melissa flies to America. And before he knows it, he reluctantly agrees to give a social gloss to the talented but uncouth film actor Rick Spencer, almost a star. And then the real pandemonium begins...