When Melody discovers an old abandoned house she sets off to explore, not expecting to find a spy in training hiding away in there. He doesn’t look much like a spy but the boy whose name is Hal is adamant that he’s on an undercover surveillance mission! Melody’s friends Matthew and Jake are not convinced, who would entrust a teenager with a mission like that? no one would, so they decide that they are going to be the spies and set out to unravel the mystery of what Hal is really up to.

The Graveyard Riddle see’s Lisa Thompson returning to her much loved characters from The Goldfish Boy, taking up the story of Melody this time in another gripping mystery!