Nick Cain has been a lawyer for the mob, but now he wants to get out. Mob boss George Vincent, realizing how much Cain knows about the inner workings of the mob, puts out a contract on Cain's life. Cain survives the attempt, but his fiancée doesn't.
Gang boss George Vincent has put out a contract on the life of former mob attorney Nick Cain. When Cain's fiancée is killed in the attempted hit, Cain sets out to prove that Vincent was responsible for the murder and bring him to justice.
When an employee is killed in an accident at the distillery of Ed Hoagley, a notorious bootlegger, he tries to make it look like a hit-and-run to divert attention away from his business. However, Cain finds out that the victim worked for Hoagley, and his suspicions cause him to check further into the "accident".
Cain hopes to break mobster Lenny Bircher's stranglehold on a town's wholesale food marketers and looks for a witness who will testify against him, but everyone is too afraid. His best hope is with the daughter of a wholesaler who has fallen for the supervisor who is under Bircher's control.
Cain's target is Herman Combes, the ruthless boss of a mountain county who has hand-picked the entire police force. He has Cain arrested for a traffic offense to prevent him from getting to the hospital to talk to a witness before he dies. But Cain plans to find another way to bring Combes down.
Mobster Louis Strode is said to be having a change of heart regarding his activities due to the death of his son from a drug-related accident, and his wife's resulting mental collapse. But Cain is not so sure he's really changed.
Dress manufacturer Louis Speckter believes gangster Alexander Marish has let him use his own trucks for years out of friendship. But now, the pressure is on Marish to get everyone in line, and Speckter and his son are the last holdouts. When the son is killed for resisting Marish, the elder Speckter still can't believe Marish had anything to do with it.
Zales Yoder and his son Kurt disagree over the extent to which they should allow Benjamin Riker to further control their business so that he can use it for smuggling purposes, even after Riker resorts to threats to get Yoder's customers to take their business elsewhere.
Cain is targeting pornography peddler Milton Bonner, but he finds he must also fight Bonner's public relations man Philip Colerane, who orders his staff to create as negative an image of Cain as possible.
While on vacation in a small town, Cain is surprised to learn that William Norman, a mobster he has been trying to nail, has been arrested for beating up the father of his girlfriend. So it surprises the local district attorney when Cain, an old friend, decides to defend Norman against this charge.
Cain decides to go ahead with prosecuting mobster Earl Klegg for conspiracy in the murder of a witness against him, even though Klegg was in prison at the time and the case is regarded by other attorneys as not being strong enough.
Jay Adams has been recruited by reformer Sam Palmer to run against Tully Johnson, the powerful and crooked district attorney of a small town. But Palmer is unaware that Adams is actually meeting with Johnson himself.
Gangster Vincent Pavanne's nephew Rick refuses to follow in his footsteps or come to see his dying father. In the hope of changing his mind, Vincent decides to prove to his nephew that anyone can be bought, and thus decides to bribe Rick's best friend, a college basketball star, into throwing a game.
Cain is in Corsica to make a recommendation as to whether he thinks exiled gangster Mike Colonni has forsaken his old ways and should be permitted to come to America again. The recent "accidental" death of a young man working for him makes him skeptical.