The morning that the world ends, Katie is getting ready for court and housewife Jenni is taking care of her family. Less than two hours later, they are fleeing for their lives from a zombie horde. Thrown together by circumstance, Jenni and Katie become a powerful zombie-killing partnership, mowing down zombies as they rescue Jenni's stepson, Jason, from an infected campground.

Sylvie Rossi has the loner thing down pat, with the exception of her best friend, Grace. But when the two are trapped in a hospital during the last gasp of a dying city, alone time is no longer an option. A nurse's offer of sanctuary promises Sylvie the supplies she needs to survive the zombies - it's the coexisting with people that might do her in. Eric Forrest will do whatever it takes to get into the dead city for his sister, including ending up dead himself. He's used to taking risks, but with every mile he travels death looks likelier.

Cassie Forrest isn't surprised to learn that the day she’s decided to get her life together is also the day the world ends. After all, she’s been on a self-imposed losing streak since her survivalist parents died: she’s stopped painting, broken off her engagement to Adrian and dated a real jerk. Rectifying her mistakes has to wait, however, because Cassie and her friends have just enough time to escape Brooklyn for her parents’ cabin before Bornavirus LX turns them into zombies, too.

Rose Winter has enough problems. With a marriage going down the tubes and a dreaded anniversary party on the horizon, the last thing she needs is the zombie apocalypse. She wanted to get drunk and sing karaoke, not murder her undead neighbors. It’s clear the party’s over, however, now Rose has more problems - a missing husband, an overbearing houseguest, and keeping her family alive.

Alex Duncan is a mother, a sister - and the daughter of a doomsday prepper. She always thought her father was insane, raving about an apocalypse she never believed in, but when a plague hits the United States and the dead no longer stay dead, Alex discovers heeding her deceased father’s advice is what will keep her family alive. Before he died, Alex’s father created a compound in Montana just in case situations like this arose. The dead walk, hungry for human flesh. With little time to spare, Alex must make split-second decisions to prevent her family from being devoured.