Humanity faces extinction. A few stubborn governments fight back, caught on the defensive. But even their concerted efforts may not be enough to stem the tide of the biological weapon sweeping the world. As people succumb to this genetically engineered weapon, they devolve into weaponized monstrosities hell-bent on destruction. But humanity hasn’t breathed its last breath yet. Those that are determined to vanquish these abominable creatures and the fanatical organization behind them still fight. 

A fanatical organization led by a rogue Russian biowarfare expert continues to expand its arsenal of biological weapons. Each design is more diabolical than the last. Now, the group plans to launch a new airborne agent that will destroy every last pocket of humanity eking out an existence in this horror-filled world. Captain Dominic Holland and his team of elite covert mercenaries are assigned to stop the launch of this terrifying new weapon. In a desperate race against time, they must navigate the treacherous waters and cities around Europe to save humanity. 

Captain Dominic Holland and his group of covert operatives are charged with uncovering the whereabouts of the fleet and stopping them before they reach land. On a mission that takes them around the crumbling strongholds of Europe, they uncover a plot more sinister than they could have possibly imagined. With few resources and little time, Dom and his Hunters put their lives on the line to save the world from utter destruction. But even that may not be enough. 

Congo already faced the extreme ravages of war before the outbreak. Deep within the militia-controlled jungles, Captain Dominic Holland and his covert group, the Hunters, follow a lead in a desperate race to uncover who is responsible for the biological weapon turning humans into the monsters known as Skulls. But what they uncover may be far more dangerous and frightening than they ever expected. Back in the US, a lost member of Dom's team faces a relentless tide of Skulls alone. The fate of the Hunters and their mission may rest in his hands.

In Morocco, tourists and merchants once packed the winding alleys and expansive markets of Tangier. Now there are only Skulls. Captain Dominic Holland and the Hunters pursue the mysterious organization responsible for the Oni Agent straight into the ravaged city. But something more frightening than anything they’ve encountered awaits. Across the Atlantic, Colonel Jacob Shepherd is tasked with delivering a key enemy scientist to the United States Government. But no journey at the end of the world is without disaster. Faced with a mission derailed by catastrophe, Shepherd must make an impossible choice to save his country—and the world.