A treasure trove of secrets and mishaps threatens to cancel Christmas in Cornelius.But little Sam and Sandy Cartwright dare to dream, as they go in search of Santa Claus.When they find themselves in the magical Black Tree forest, with their school friend Timmy Dean, the children go on an unforgettable adventure.But when they are led to a place beyond earth...that is as eerie as it is enchanting, their lives are changed forever.