Detective Jack and Deputy Poco Loco are exploring the sights of London when they crash into a new case Riddling rats, meddlesome bats, and six missing ravens! The Dog Detectives are cycling through the busy streets of London when they crash into a new case: the guardians of the city, six black ravens, are missing from the Tower of London. With the help of the rat riddler, the Dog Detectives must solve the riddles and find the ravens, before it s too late! The team searches amongst well known landmarks, such as Buckingham Palace, St. Paul's Cathedral, Trafalgar Square, and Big Ben. Finally the last raven is found in the only place they forgot...The Tower of London!