Two identical twin sisters, separated at birth by their parents' divorce, are reunited years later at a summer camp, where they scheme to bring their parents back together. The girls, one of whom has been living with their mother and the other with their father, switch places after camp and go to work on their plan, the first objective being to scare off a gold-digger pursuing their father.

Hayley Millsas Susan Evers / Sharon McKendrick
Maureen O'Haraas Margaret 'Maggie' McKendrick
Brian Keithas Mitch Evers
Charles Rugglesas Charles McKendrick
Cathleen Nesbittas Louise McKendrick
Una Merkelas Verbena
Joanna Barnesas Vicky Robinson
Linda Watkinsas Edna Robinson
Crahan Dentonas Hecky
Leo G. Carrollas Rev. Dr. Mosby
Lucien Ballard