PI Alo Nudger, at the St Louis airport to pick up a pal, offers his business card to a distraught woman just before an incoming plane blows apart. The next morning she arrives at his office with a wild story about a bomb in an attache case and a fortune in stolen diamonds, and Nudger gets involved because he needs the fee to fend off his greedy, vindictive ex-wife and her sleazy lawyer. Then his new client is tortured and murdered, and when the hard-nosed killers threaten Nudger's lover and let Nudger know that they are watching his every move, Nudger's friend and former partner, police detective Jack Hammersmith, offers information and protection.