Tod Slaughter gives his most maniacal performance ever in this adaptation of Maurice Sandoz's famous stage play Spring-Heeled Jack. Philip Wraydon (Tod Slaughter), a murderous Napoleonic spy previously exiled in France, returns to England and becomes a crazed inventor with a hatred of all things British. He embarks on a killing spree, seeking revenge on his brother's family. His nephew, young captain Jack Wraydon, aka 'Spring Heeled Jack', becomes the prime suspect after falling foul with the police. The only way Jack (Bruce Seton) can prove his innocence is by finding and trapping the real killer.