The Mediterranean, early 1940s. Lieutenant Harry Gilmour, captain of the S-Class submarine HMS Scourge, has been tasked with patrolling the Mediterranean and supporting operations for the Allied forces. Someone, however, is on his tail: Captain Charles 'the Bonny Boy' Bonalleck VC, who cannot forget Lt Gilmour calling him out on his conduct during an operation early in the war. Harry is tired now, not having had leave...