This is the new world.

Not the old.

The dead walk, demand human flesh, and howl at the wall surrounding a Fort on a hill.

A group of Texans stands against the zombie hordes, fighting to create a new community in a dead world. Unknown to them, their legend is starting to spread far and wide.

Emma Valdez's life was forever changed when the zombies destroyed the world. She spent all her time and energy systematically killing all the zombies in her town while searching for her missing son. After a yearlong search, she finally put him to rest and planned to take her own exit from the zombie infested world. But a dream about a mysterious woman with raven black hair wearing a red sweater compelled her to seek out a community of survivors in Ashley Oaks, Texas. Little did she realize this was the start of a new season in her life.

The Fort inhabitants, meanwhile, deal with the aftermath of the battle they fought against a massive horde of zombies and successfully redirected away from the town. Many mourn the loss of friends while helping repair and rebuild the Fort's defenses. Danger still lurks on the outskirts of town as the horde continues its trek into the west. Emma arrives just in time for yet another harrowing battle outside the walls.

Guided by Juan De La Torre, who is nursing his own wounded heart, Emma finds her place among the Fort inhabitants and uses her excellent survival skills to help save others. It's not easy being the newcomer among people who have formed a family since the rise of the zombies. She struggles with adjusting and is not always comfortable with the close proximity of so many other people. But the high walls promise safety and the friendly smiles are welcoming.

When a zombie of a former Fort inhabitant shows up outside the wall, Emma is part of a team that is sent out to investigate what happened to the group that abandoned the Fort before the big battle. What happened to them might alter the course of the Fort forever.

After Siege takes place in the days following the battle in Siege: As The World Dies, Book 3. Emma's background story is featured in The Untold Tales: As The World Dies, Book 3.5.