Pacing the dark, deserted rooms of Castle Arden, the scarred man checks his plan for the hundredth time.
The plan he has worked on for months.
The plan he is about to put into action!
The Baker children can’t believe their luck when they find out they are staying at a castle for the weekend.
But when they uncover a plot to steal forgotten treasures, Millie, Jamie, Zach and their dog Harvey know they have to act.
Are they smart enough to outwit the thieves?
Can they decode the clues in time?
Or has their spying put them in too much danger?