At the height of the Cold War, Russia keeps probing neutral Sweden’s Naval Defences. Sweden turns to Great Britain for help. They lease a second X craft midget submarine from the Royal Navy under the utmost secrecy. Sweden has already purchased an X Craft off the Royal Navy, but the Russians are monitoring her activities. There is no time to train up a new Captain, so the Royal Navy sends an experienced ex Passage Commanding Officer, who is now in the Reserve, to command the ‘boat’ in the elusive hunt for the enemy. They resort to all kinds of subterfuge to keep the project secret.
HOW DO YOU STOP THE RUSSIANS SPYING ON YOUR MOST SECRET NAVAL OPERATIONS?