Convoy of ships engaged in battle while taking supplies across the Mediterranean to Malta.
Titles read: "BATTLE OF THE CONVOYS".
Mediterranean Sea and Malta.
L/S of the Rock of Gibraltar. Seamen on a warship wave at the camera. Various shots of a Mediterranean convoy heading for Malta. Dusk falls and the convoy's guns open fire on enemy aircraft.
Depth charges are laid and then we see them exploding. The following day the convoy keeps up the barrage. L/S of explosions way off on the horizon as shells find their mark. L/S of Fleet Air Arm planes returning to carrier after battle.
Various shots of guns of the Alexandria convoy go into action when attacks come from Italian aircraft. L/S of explosions near the ships from the falling bombs. On board a ship while repairs are carried out and the crew set to and push the capstan by hand while a fiddler plays a jig.
Back with the Gibraltar convoy where the accompanying warships start to lay a smoke screen around the merchantmen. Various shots of convoy guns in action. L/S of an Italian torpedo plane flying low over the ship then nose-diving into the sea. Several shots of the convoy off Malta; brief shot of man eating on board; men on one of the ships wave to the camera. Various shots showing bomb damage in Malta.