For years the alien Greys have visited our world, content to steal away anyone they pleased into the darkness of space and return them traumatized but physically unharmed...until now. A young couple, parked along a secluded stretch of Tennessee backwoods witnesses a blue light coming toward them. Fearing for their lives, they run, desperate to escape. But the invasion has begun, and in the end, no one will escape alive. Catherine and Weston soon find their lives turned upside down as science fiction becomes fact and the true horror of why the Greys are on Earth is slowly revealed to them in a constantly changing vision of a new reality. Now they are being hunted. For Catherine holds something vital to exposing the alien conspiracy and the Greys will do everything in their power to regain it. Now the race is on for Catherine and Weston to uncover the mysterious plot before the dark figures come for them one last time. On the run, with no one they can trust, she knows it's only a matter of time before, they too, become victims of...the Human Harvest.

Having thought she'd escaped Grim's Vagrants, Mina and Boyd make their way along the highway toward what they hope is freedom and the start of a new life. But the Vagrants won't let them leave, or forgive them so lightly for disobeying, The Master. In a world overrun by the undead, Mina finds her enemies are those among the living, as she struggles to make new allies and reach a frozen wasteland she hopes offers safety from the plague of dead.

The dead continue to attack and roam the zoo, picking off survivors and reclaiming the earth. Having suffered a car crash, Mina must make her way to the Ranger's Station where she learns that not all of the Marauders have left, some have stayed, and they've taken hostages. Can she rescue them and push back the undead hordes or will they continue to walk among the living?

Enlisted into the dead army against her will and abandoned by Cherry, the zombie, Rachel, must find a way to regain her lost freedom. Controlled by the dark haired, Mina, she will stop at nothing to finish off Grim's Vagrants once and for all, even if it means exhausting all those within the undead ranks. Rachel must suffer through her slavery or risk losing everything, as she struggles to survive in an apocalyptic world.

Struggling to survive the infected and unruly Marauders, Mina joins forces with Sofia as she attempts to rescue her lover, Job. But, along the way Mina discovers the zoo could provide a safe haven for her and her new companions. Will they be willing to fight for their newly claimed home or give it up to the plague of countless undead? As long as the dead walk among the living, no one is safe.

Russo had everything once: a loving wife, a great son, a decent job working at a scrap yard, and a secluded cabin nestled deep within the woods of Mascot, Tennessee. But all that changed when the beast came; it lurked in the shadows, ever watchful, and waiting for the right time to strike when Russo was away at work. Locked away in an asylum for years, Russo is released and vows revenge on the beast and will stop at nothing until he gets it.

Gunner is a man on a mission. He wants to destroy the Mother Ship orbiting Earth and all the alien Grays along with it. The only problem is: he's been captured, held in a tiny cluttered room aboard a Gray ship; his only sanity is in his journal, but sanity is a fleeting thing, especially when you're only a survivor of: After Invasion.

Starting where After Invasion: Survivors left off, James, a self stylized leader of a small band of scouts, witnessed an alien invader's ship explode and crash into a nearby forest. He enlists the help of his friend, Owen, a drifter, to investigate the downed craft and discover the Greys agenda only they find something much worse and barely escape the ship alive. Witnessing the Greys minor defeat, James finds hope where there was none before, and forms a resistance group to save what remains of Earth and its inhabitants.

As Mina struggles with the power of controlling an army of the dead, tensions rise as Boyd pays more attention to his sister, Neala, than her. Mina finds herself choosing between Picker, a mysterious, muscular acquaintance, and the shy, silent Boyd for her affections. But, as the battle between Mina's undead army and the Vagrants rises, she makes a discovery in a pale female zombie who could change everything, as the crossover between, A Zombie Apocalypse, and, The Dead Walk among the Living continues.

After faking her death, Rachel claws her way out of the ground and leaves Marshall to live in peace. Aimlessly, she wanders the highway where she meets an unlucky girl named, Neala, and begins to unravel a plot which has followed her since she became infected.

After Parn's demise, Mina is reunited with Joe and Sandy. But in the span of time they've been apart, Joe has made deals he cannot back out of and Mina's trust in him has faultered. A new group has risen among the survivors. A band of silent men called, Grim's Vagrants, who use the undead for their advantage rather than fight themselves. Will Mina be able to handle Joe and the new threat or will she just end up another corpse?

After suffering the loss of his vampire kin, Matthew heads for The North Cherokee Forest in hopes of finding a new covenant. But, he meets an unlikely band of humans along the way, and finds himself second guessing his role in the world where the dead eat the living.

Every lifetime the witches of Buzzard's Bluff must complete a sleeping ritual, failure to do so brings about The Devourer, an ancient creature sleeping deep under the mountain, which is only sated on innocent blood. Stacy Skywood is a new witch, along with her best friend Cleo, they must lure four unsuspecting victims to the top of the bluff for The Devourer to feed, but all is not what it appears to be, and the young witches will be tested in ways they cannot fathom.

Having finally discovered Boyd, Mina must convince him to come back to the zoo where he and his group of survivors will be safe. But he only agrees on one condition. Other victims of the Dementia Plague live nearby and if Boyd is to join her ranks she'll have to finish off one of his most detestable enemies: Gordo. But with the world swarmed by rotters and nowhere to hide that is ever truly safe, will she succumb to Boyd's plan or fall prey to the undead before she even reaches her target?