"Jack Sullivan and his friends June, Quint and Dirk discover that they might not be the last kids on Earth after all ... And everyone is thrilled - except Jack. Living in a tree house with his best friends, battling monsters and escaping certain death - he's been having the most awesome time of his life. Somehow he's got to persuade his friends that life is perfect just the way it is ... then they won't leave him. But that's not so easy when there's...