Somebody else's summer

On a flight from Vancouver to Toronto, two girls meet, forming an unlikely friendship. Tall, athletic Samantha is going to spend the summer with a family friend, while her father is in South America. Alexis, a shy girl who likes books, is being sent to a horse farm to learn how to ride, while her parents are travelling in Australia. They are going to trade places for the summer! For the people they are going to stay with have never met them, and their parents are far away. Can they pull it off?