After the grotesque revenge murder of her adopted son by a kiddie-porn ring, Detective Lieutenant Kay Boyd has a mental breakdown that plunges her into a deep depression. Now the undisputed "Meth King" of Boston, arch-criminal Joseph Xavier Null tries to convince Boyd that to cure herself she should join with him in his strategy to start at the top of the top of the ring-the Hebe Group-and kill their way down.
At first she refuses, but Null proposes that Boyd approach members of the Hebe Group and offer them the opportunity to surrender themselves, or deal with murderous psychopath Null, who will torture and kill them.
Null finds himself drugged and delivered to Hebe Group hitmen by criminal contract killer Janis, who in the nick of time decides to side with Null. Later, she and Boyd wind up rescuing Null again, this time from the creepy psychopath known as the Expert. But Hebe Group has their own expert, the nefarious Legere. It's going to take Janis, Boyd and the tough street gang run by Null - the Gangsta Boyz - to finish the Hebe Group, whose kiddie porn and child abuse extends from Boston to Dubai.