Two identical twin sisters, Hallie and Annie, meet at summer camp and decide to switch places, with one going to live with their mother in California and the other with their father in England. Posing as each other, the twins attempt to reunite their divorced parents, who separated after the girls were born. Through their deceptions, the parents begin to realize how much they still care for one another. In the end, the twin's scheme is successful and their mother and father decide to remarry and bring the family back together.