As the first waves of injured bystanders, guardsmen, and rioters arrived at hospitals, it became apparent that a deadly new disease had been unleashed on the population. Whether the virus was naturally occurring or an escaped lab experiment, Cade hadn't a clue and wasn't especially concerned until he learned of its unprecedented virulence, unusual method of transference, and the fact that, according to the news, it brought the newly dead back to life, semi-mindless, and with an insatiable desire to feed on the flesh of the living.

After running and gunning across much of the western US, Cade Grayson, former Delta Force operator, is finally reunited with his wife, Brook, and daughter, Raven. Hours after arriving at the relative safety of Schriever Air Force Base in Colorado Springs, the new Capital of the United States, Cade is approached by the new president, Valerie Clay. Her request is simple: she appeals to the patriot in him to rejoin the unit that he left for civilian life 15 months prior and once more go into harm's way, taking the fight to the enemy.

Reeling from a surprise attack, and with two fires burning out of control, Schriever Air Force Base goes on high alert. Former CDC Scientist Sylvester Fuentes, the apparent target, is killed along with others. Destroyed in the conflagration was the Omega antiserum Fuentes had been working to perfect and just hours prior had tested successfully on one of the recently infected.

Allegiance picks up two days after A Pound of Flesh left off. Outbreak - Day 15. With an estimated 99 percent of the United States' population having already succumbed to the rapidly spreading Omega virus, and countries and cities worldwide teeming with the dead, the struggle to survive the zombie apocalypse continues unabated in the high desert of Colorado.

Outbreak - Day 16: With an estimated 99 percent of the United States' population having already succumbed to the Omega Virus and been reanimated to form roving hordes of flesh-eating monsters, two groups of survivors struggle against long odds to survive the zombie apocalypse.

Cade Grayson, father, husband, and former Delta Force operator collected his fair share of ghosts as the Omega virus ravaged the United States, turning the majority of her population into mindless automatons hungering for human flesh. Wearing incredulous stares, the faces of those ghosts - dozens of men, women, and children he was unable to save during his many forays into the Z-infested wasteland - visit him nightly during the early morning hours when defenses are dulled and REM sleep has him in its firm grip.

In the three weeks since mounting a brash rescue mission to a zombie-infested Los Angeles and returning home to find lives of loved ones hanging in the balance, Cade has occupied himself with runs outside the wire to procure supplies necessary to ride out what the Farmer's Almanac predicts will be a long, cold winter. As Cade and his team seize an unforeseen opportunity provided by the plummeting temperatures, he quickly realizes they are in a race against time - and nature's fickle whims.

Cade Grayson - husband, father, patriot - discovered two undead enemy soldiers on American soil, and soon the official call to duty came directly from the President herself in a transmission beamed by military satellite to Cade's refuge in rural Utah: It was time to take up arms in defense of his country once again. Valerie Clay’s hard-to-fathom video footage, showing thousands of enemy soldiers establishing beachheads all along the West Coast, made it impossible to resist. He was a former US Army Delta Operator and he had to come to the aid of his dying country.

A feeling of longing for a home that no longer exists or for one that never was. Mike and the crew fight for their right to survive, to carve out a new home, even though Mike cannot help but carry with him all the group has lost. He now wonders if he can continue to sacrifice his own for the sake of others. As terrifying new monsters are born amid the chaos, do our heroes have the will and the firepower to overcome these latest threats?  

Presidents, premiers, entire governments disappeared instantly, like a fragile house of cards in a hurricane. Some hid deep underground or holed up in fortified strongholds, but most were swallowed up by the dead, never to be heard from again. For Cade Grayson, doting father and patriotic Delta Force operator, the past week has been the worst dealt to him by life during his short 35-year stint on planet Earth.

Oubreak - Week 1: Presidents, prime ministers, entire governments disappeared instantly, like a fragile house of cards in a hurricane. Some hid deep underground or holed up in fortified strongholds, but most were swallowed up by the dead, never to be heard from again. Having lost both parents just weeks apart - one to Omega, the other to a brutal beating inflicted by Chinese PLA soldiers - 12-year-old Raven Grayson finds herself in the nation’s new capital, battling loneliness and depression, all while trying to find her place among her fellow transplanted Eden survivors.

Miah Gray is a 27-year-old former army soldier living in rural New Hampshire with his sister, mother, and her boyfriend. He is plagued by PTSD, finding solace, but not redemption, with the aid of prescribed cannabis. All he wants to do is get high, relax with a good sandwich, and watch a meteor shower with his neighborhood crush, Jen. When the sun's light is blotted out the following morning and the world is plunged into darkness, Miah finds himself locked down with his family, covering windows with trash bags, lighting candles, and following the arcane rules of an ancient prophecy.

A cosmic noose tightens around our heroes’ necks as, once again, they are tasked to fight a war not their own. Their every move is watched, their every action thwarted, yet failure here will seal the fate of countless billions to something worse than death. Can Jack, Mike, BT, Trip, and Kalandar find a way to overcome the odds that have been stacked against them, or will it all come crashing down upon their heads? 

Our heroes have gone their separate ways in an effort to save Trip and unify their fight against the Overseers, who have an evil plot to take over not only this world, but all worlds. Mike asks for and receives help, but not in any way he could have prepared for, as Jack finds himself in the uncomfortable position of filling Otter’s shoes. Can Jack and Mike find a way to destroy the evil that has been unwittingly unleashed or will they succumb like every other civilization the enemy has encountered?

Follow Jack, Trip, and Mike in this next installment to find out what the universe will throw at them next.