Ten percent on murder was the commission charged the Underworld by the strangest crime czar who had ever laid siege to Manhattan. In return, he guaranteed the immunity from arrest of all criminals — and when the police dared oppose him, they died! For this eerie, invisible tyrant had mastered the secret of Sudden Death. Those who challenged his rule were stricken by dreadful spasms and dies agonizingly while their bodies turned green! Overnight, New York had become the world’s Crime Capitol. It was then that Richard Wentworth, the Spider, took up the trail of a master criminal, more dangerous than any encountered in his whole experience — to bait the Spider’s web for a foe who had raised crime to a great, evil art, and sacked a city for a killer’s cut of ten percent in blood!