Barbie and Ken are having the time of their lives in the colorful and seemingly perfect world of Barbie Land. However, when they get a chance to go to the real world, they soon discover the joys and perils of living among humans.

An American nanny is shocked that her new English family’s boy is actually a life-sized doll. After she violates a list of strict rules, disturbing events make her believe that the doll is really alive.