It's another tricky case for the famous dog detective and his trusty sidekick, Dr Whatsup Wombat. Professor Greymatter's been kidnapped, together with his top-secret brainwashing invention, and the only clue is a set of mysterious footprints left in wet cement. Could this be the work of the furry fiend, Professor Ha-Ha Hyena-criminal mastermind and Sherlock Hound's arch enemy...?