Olson is the solution to the noxious outside air. However, he soon finds out that he isn't the only one involved in the sinister plan Erik is hatching. Both of the cities that weathered the apocalypse now depend on Olson unraveling what Erik has in store.Meanwhile, a small community not too far from these cities sees the buildings burning from Erik's coup of the government. They possess a nuclear warhead from the forgotten world and send a small team to see what is happening.In the St. Paul Collective, Natalie is pregnant with Olson's offspring. She finds out that her unborn child is wanted by the people in power for study because of Olson's natural ability. She will do anything to protect her kid.Find out how it all plays out in the third and final installment of the Atmospheric Pressure series.