When the Brown family relocates to a small town in Scotland, their children, Peter and Julie, accidentally uncover the secret of an ancient legend. With the help of their two new friends Timmy and Tubby, they find the door that leads to the secret chambers and are propelled into a magical and exciting adventure. An adventure that stretches their imagination beyond their wildest dreams and worst nightmares. By entering the secret chambers the Children break a spell and by doing so start a catastrophic chain reaction. In a race against time and good versus evil, they must must find the secret...