Infame ricatto

In a showdown between Joe Ventura's underworld gang and a group of thugs living in a camper, a girl is seriously injured. She too was supposed to die like her friends, and now she is constantly guarded in the hospital by the police. A problem for the instigator, who does not want to leave witnesses to his dirty dealings. The only solution is to kidnap the girl's sister, to force the father, tied to Ventura by an old debt, to kill his other daughter! Only Nick Raider can prevent the infamous blackmail...