Imagine a bribery conspiracy, fraud, abuse of power and illicit sex. Now imagine that this is taking place within the IRS. As the IRS continues with its criminal investigations, the Justice Department is pursuing criminal prosecutions of those guilty of tax crimes. While this is taking place, a shocking discovery will be made that undermines the integrity of the IRS. IRS employees responsible for the administration of the tax laws are discovered to be guilty of manipulating the tax system in a plot so ingenious that only one intrepid IRS agent can solve the mystery. However, while he is dealing with this problem, he must also match wits with a brilliant sociopath who is now behind bars. IRS officials will later learn of a second bribery conspiracy that is equally shocking and controversial. The Justice Department has decided that for justice to be achieved, the mastermind of the criminal conspiracy must be brought to justice. Revenue Agent Louie Lipschitz makes his triumphant return in DEN of THIEVES. But can even he overcome all of the challenges in his path so that the guilty can be brought to justice?