Summary: I. "Bases of victory." Beaufighters and Mosquitos of RAF Coastal Command attack enemy shipping in the Channel. Camera-gun film vividly portrays these engagements as well as strafing attacks against enemy gas-works, trains and oil installations which explode in flames. Commentary says "it is now clear the Germans will contest every yard till the final break." Calais has now been liberated; town lies devastated but Clock Tower still stands. View of a "remote-controlled" flame-thrower in a street. Devastation in Brest is even greater. U-Boat pens withstood all but 12,000 lb bombs dropped by the RAF. 35,000 prisoners enter POW camp.
II. "The other man's job. British flame-thrower is master weapon." Scenes of the manufacture of the mobile flame-thrower unit used in the Churchill 'Crocodile' and Bren carrier 'Wasp.' Fuel tanks are fitted inside the bullet-proof trailer then projector and nozzle are fitted and tested (with compressed air). Practice demonstration by Wasps and Crocodiles, described as "fine tools with which to finish the job."