Huge angles, super tractors, gigantic cranes, mechanical saws, dynamic dredgers, even psychological thought-reading devices clash with one another in the hall of a great exhibition. During the night, the machines break through the walls of the auditorium and run wild in the streets — destroying homes, knocking over towers, devastating fields. Military might is mobilized and army artillery is dispatched to destroy the machine monsters. But the guns, and tanks and cannons refuse to fire on their fellow machines, and instead join the rebels. A few human beings escaped and from a mountain side watched the destruction of their man-made world.