Armed with new (albeit minimal) knowledge on the threats they face, Sara and Zack make their way towards the safety of an abandoned traveling circus train car where they encounter a group of people, Sara and Zack must decide their fates together in order to keep moving forward, as Sara is determined to go to New York City. What other dangers do they face amidst the train cars? Will they make it out in one piece and back on the road? The world has suddenly changed, and they have to adapt. How many lives will they lose in the process?