"Forget what you thought you knew about this story, because everything is about to change. With Alyssa near death, Luke, Jacob and their companions make a desperate attempt to reach Boston with the final ingredient needed for the plague antidote. They must travel through the Canadian wilderness, some of the roughest country in North America. Along the way they are joined by new friends and old as they fight to reach their destination and save Alyssa. What they don't know is that something is hunting them. Something evil is lurking, waiting to strike when they least expect it. After years of fighting courageously against the living plague, they'd thought they knew their enemy. They'd believed their wits, bravery and strength would be enough to win this fight against the threat that had overrun so much of the world they once knew. But they were wrong. Now Luke, Risa, Jacob, DeAndre and Jonathan face their most dangerous trials yet as they battle the ever-present zombie threat, along with a new challenge they never saw coming. How many ways can this plague try to kill them? Find out, in the latest installment of the Mad World series."