The tale of identical twin sisters who were separated shortly after birth by the break-up of their different continents by their two successful parents. Hallie is growing up in Napa Valley with her vineyard-owner father, Nick Parker. Annie is raised in fashionable London by her mother, Elizabeth James, a reknowned wedding gown designer. Unaware of each other's existence, fate intervenes when the girls coincidentally meet at summer camp in Maine. Eager to meet their respective parents, the girls devise a scheme to switch places and ultimately, reunite their mom and dad. Their plan takes on urgent proportions when they learn their father has fallen for the young, beautiful and opportunistic Meredith Blake.