A convoy of commercial vehicles, including a fire engine, an ambulance and a dustcart, leave the Dennis factory in Guildford. They are parked on the roadside where the camera films their unique traits. An aerial shot of the factory is followed by footage of a vintage Dennis car and two vintage Dennis fire engines being driven through its grounds. The chairman of the Dennis Bros. Ltd, John King, arrives by helicopter. He is interviewed about the changing fortunes of the company and the practices being put into place to revive its production and sales figures. Footage of a Dennis fire engine being used by the Warley Fire Brigade to put out a blaze follows. The action returns to the Dennis factory where workers are seen working on various stages of the production line. The timber frame of a fire engine is being constructed. Elsewhere a lorry's fibreglass chassis is being worked on. Gearboxes are being built on lathes, engines are lowered into chassis, and vehicles are being spray painted. Mercury airfield vehicles are filmed towing aircraft at Britain's airports. The film ends with images of a fire engine bound for Honk Kong being loaded into the hull of a ship.