In the Mediterranean in 1941 the Italians start using underwater chariots to mine the undersides of allied ships. Explosives expert Lionel Crabbe arrives in Gibraltar to organise defenses, but finds only two British divers available to help him. Even more worrying, it seems likely that the Italians are secretly using neutral Spain across the bay as their key base.
The Silent Enemy
During WW2, Italian Navy divers use underwater chariots to mine the keels of British warships, forcing the British to send underwater demolition expert Lionel Crabbe and his team to counter these enemy actions.
