The Battle of Britain is over but the war has only just started. Sub Lieutenant Hunt has returned to the Fleet Air Arm. After learning to to fly the new naval Martlet fighter, he helps pass on some of his combat experience at the new Air Station at Yeovilton before going to sea in HMS Audacious one of two merchantmen converted to small aircraft carriers to protect convoys. Meanwhile, his Fianc? Heather is flying regularly for the Air Transport...