Once a zombie apocalypse occurs and the last of Xander's family dies, he's set on a journey to head to California from Missouri with only a map his sister Aviva gave him. He's told by his family to survive for them and make it out of this mess, he believes he can get there alone until he runs into some trouble. Now the only way to get to his destination is by the help of those who've survived and are in the same position as him. But when will he figure that out?