Butta', Munch, Kasey and Trigger are back in pursuit of the last and largest of the Stein diamonds-taking them to the farthest reaches of the world to claim what Butta' rightfully believes belongs to her. Unbeknownst to them, a bigger-"much more elaborate scheme" is in motion; guided by people of vast power who require the priceless gem to complete an incredible weapon-developed by the troubled "Professor Wyman Fowler," whom struggles with his conscience, and takes matters into his own hands. All the while, "Inspector Ellen Cobart" and "Detective Frank Tulley" hunt Butta' down by order of "Diandra Stein"-daughter of the slain mastermind Lingo Stein-just as a new, mysterious player, "Marigold" enters the game with an agenda of her own. When Fowler disrupts the balance of power, his actions ignite everyone connected to the diamond and place an innocent little girl in the cross-hairs of "anyone" standing in their way.