Cities across the United Entities continue to burn. Fractured military forces struggle to preserve what is left of Stability as The Harbingers of the Fall push society ever closer to collapse. Adrift in this conflict, characters both familiar and new must forge their paths through the chaos.After facing heavy losses, the small group of cadet pilots take their battered training mechs back to the Academy, unsure of what they may find waiting for them. Zak, separated from his fellow cadets, finds himself helping an enemy soldier. Alison reluctantly relies on him in her desperate search for Eva. After abandoning his position as the Voice of the Fall, John struggles to come to terms with the damage his words have caused. Continuing her journey north, Katherine delivers precious cargo to the Harbingers. Following in her wake, Mark leaves the shattered wreckage of his command mech, intent on infiltrating the rebel cause and taking revenge.These paths, woven across the desert like smoke on the wind, converge in one place: The Hollows. This massive Harbinger base, hidden deep within a mountain, holds a secret that will challenge allegiances and shake the very foundations of everything we know.