For Army Reserve soldier Michael Cross, the world as he knows it ends in an instant. One minute he’s in college, and the next rioters are roaming the highway around him, breaking into cars and literally tearing people apart. This is the day the dead walk. This is the world of We’re Alive.

Melanie Hoskins, an experienced firefighter-paramedic, has been recruited by a very selective and secret organisation known as The Division. Their mission is to protect the populace and secure the continuation of the United States. The Division is only activated at times of dire need. This just so happens to be one of those times. Based in New York City, Hoskins is forced to leave her civilian life and those she loves behind, and join the front line to try to control the 'dollar flu' virus that has been spreading throughout the city.

It all starts with a single dead person coming back to life. Within three days, the undead have taken over most of town. Despite heroic efforts and swift initiatives from the government, disaster keeps spiraling. Soon, the infection reaches the nation's borders, threatening to become a worldwide pandemic.

Darrow is a Red, a member of the lowest caste in the color-coded society of the future. Like his fellow Reds, he works all day, believing that he and his people are making the surface of Mars livable for future generations. Yet he toils willingly, trusting that his blood and sweat will one day result in a better world for his children. But Darrow and his kind have been betrayed. Soon he discovers that humanity reached the surface generations ago. Vast cities and lush wilds spread across the planet. Darrow—and Reds like him—are nothing more than slaves to a decadent ruling class.

A survivor of undead suburbia, mountain man Augustus “Gus” Berry is extremely careful when it comes to his actions and movements. He takes no chances and painstakingly weighs every decision—until he sets out for the hospital at the edge of town, hoping to discover a treasure trove of essential supplies. Soon, Gus will experience terror the likes of which he's never encountered before . . .