England 1905. When a mysterious capsule lands on Earth at Horsell Common, George and Amy are among the first to examine it. However, this is no inanimate object but a transport for a living organism from outer space. As more people gather to study it, its movements kills scores of people. Martians have arrived. And so begins a terrifying ordeal as more capsules land in Britain and release murderous Martian tripods, which stalk England exterminating and consuming everything in their wake. Aliens have arrived and mankind faces an almighty fight for survival.