Never before had greedy, criminal genius loosed so loathsome and deadly a weapon! The Bat Man — leading a band of savages, releasing clouds of bloodthirsty vampire bats — planned to make himself a greater conqueror than Napoleon or Genghis Khan! One man stood in his way — Richard Wentworth, who when the Law fails, sallies forth as the dread Spider to spread red death in the Underworld. And the Spider — his beloved Nita forfeited, his loyal servants captive, his own life ever in horrible danger — must battle both the Bat Man and a broken heart!