Traces the development of weapons through the lives of such inventors and their inventions as David Bushnell and the submarine, Samuel Colt and the revolver, John Ericsson and the battleship, Hiram Maxim and the machine gun, and Ernest Swinton and the tank.
Profiles eight inventors of motion picture technology, including W.K.L. Dickson, Auguste and Louis Lumière, Lee de Forest, Herbert Kalmus, Linwood Dunn, Mike Todd, and Garrett Brown.