The Famous Five are Julian, Dick, George, Anne and, of course, Timmy the Dog.  They find adventure and excitement wherever they go!  How will they solve this mystery?
A holiday with horse-drawn caravans and an old ruined castle nearby!  The Famous Five have lots of exploring to do!  But the castle isn't empty, and the gang have spotted a mysterious face at the tower window.  Who is hiding up there?  Looks like another case for the intrepid five to solve . . .