After their parent's return from abroad is delayed, 14-year-old Vicky and her younger brother Aidan are taken by their Uncle Lance to visit the Earl of Sackville. They quickly discover that this is no ordinary holiday in the countryside.

The Johnson family's peaceful dairy farm life is turned upside down when the youngest son, David, wakes up to find a strange teenage girl in his closet. Her name is Jem Johnson, and she claims to be from the year 2098.