Carla has long feared her son, Jacob, may have the disease. Following his first mandatory test, her fears are realized, and now The Party is coming for Jacob. The law says he must be cured, but Carla has doubts about The Party's promises. Rumors have spread from one end of the city to the other and back again for years that a cure doesn't actually exist. If you're diagnosed with the disease, no one ever sees you again. Or so the rumors say.
Finding a plain white card with the words Do you want to ride the train? inscribed on one side, Carla has a spark of hope. But the simple act of possessing the card is an act of treason, punishable by death. Carla wants to believe she can get Jacob to freedom, but that means trusting a man named Alex, who appears at the worst and best possible time. Alex offers the only means of protecting Jacob, but dark secrets from his past are quickly catching up to him. Those secrets may mean the end of hope, but they could also be the means for a better future for all of humanity.