***SPOILERS**** Private investigator Mike Barnett is to be the star witness at a senate hearing about vice in America that has big time gangster Augy Burns very nervous. So nervous that Augy has two of his tugs Harry & Doc as well as his gun moll Mary attempt to kidnap Barnett and send him back, all expenses paid, to New York before he's to appeared before the senate committee. The first attempt to get Barnett on a plane back home falls apart when a couple of US Marines together with Barnett's good friend US Government employee Sam Randell spots him and the very sight of them has both Harry & Doc, who were holding with a gun to his back him hostage, split and run.
Still determined to keep Barnett from testifying Augy uses milder tactics by first bribing Barnett with $10,000.00 in marked money-that if having it on his person would have him arrested by the police-and even later when that didn't work has his gun-moll Mary have Barnett again kidnapped by her acting as a lady in distress who needed a ride that he's to, by flagging a cab, provide for her.
***SPOILERS*** Escaping from Mary, who was holding a gun on him, with his life as well as mind in tact Barnett then gets a cab to take him back to the senate hearing but is again kidnapped, the cab driver is one of Augy's thugs, and has to make a quick exit, by almost strangling the cab driver, and finally makes it back to the Capital to testify. As it turned out Barnett wasn't really asked about when he knew of Augy's actions, he was too small of a fry for the senate committee to fry, but the kidnapping charges and passing counterfeit money was what eventually did Augy in.