Although he wants to take his Cub Scouts to Wales, Heron Melomane (aka Colonel Clifton) is forced to take them to Devonshire.
The reason for this change of plan: a note in his letterbox stating that WWII isn't finished yet - signed AKC 666!
Decrypted by his faithful housekeeper, Miss Partridge, the message reveals plans for a mysterious meeting.
The Bristish Secret Service, intrigued by this note, chose Clifton to sort out this mystery.
But Clifton is unaware that MI5 sent a new agent to protect him, just in case...