Hoping for positive publicity, a tobacco company offers $25 million to any American town that quits smoking for 30 days. Amidst a media frenzy, Eagle Rock, Iowa accepts the challenge while the company's PR man tries to sabotage the effort.
The Case of the Scorpion's Tail begins with the mysterious death of a millionaire and spirals into the murder of his suddenly rich wife, which draws the attention of a dogged investigator, who follows a trail of blood to the bitter end.
After going to prison for killing the boss of the Kanno gang, a gangster gets released early - only to find that his ex-gang has merged with the Kannos. But with bitter resentments lingering on both sides, bloodshed is bound to begin anew.