The city where people live in "Breathe" is in a pod. Only the people that can afford air can live there. The people that can't afford air are left to die outside the pod. The planet they live on is an airless planet. A girl named Alina is in a secret resistance. one mission she was on went wrong and she had no choice but to leave the pod. All she has is two days of oxygen to try to find a tree protected by rebels. Read the book to find out the rest.