Police Lt. Diamond is told to close his surveillance of suspected mob boss Mr. Brown because it's costing the department too much money with no results. Diamond makes one last attempt to uncover evidence against Brown by going to Brown's girlfriend, Susan Lowell.—Norman L Cook
A police lieutenant is ordered to stop investigating deadly crime boss Mr. Brown because he hasn't been able to get any hard evidence against him. He goes after Brown's girlfriend, who despises him, for information instead.