WHAT DO YOU DOSarah Louis thought a bad case of the flu was the worst of her problems. The first time she leaves her apartment in five days, she sees the unthinkable. A man kills another man in front of her, then grabs her hand tells her to run. What's happening?WHEN THE DEAD WALK?The world as she knew it is gone. Somehow, the dead have come back to life. Sarah and her newfound friends, Ryan, his brother Mick and Becca, have to learn to fight, to survive, and to hope in a strange new world.