In the not-too-distant future the air on Earth has become unbreathable. However a multinational company called Air Co. has constructed generators that provide oxygen for those who can afford it.

Peace Dog a desperate ex-soldier who has been willing to do anything to obtain breathable air is haunted by his past and hunted by bounty hunters though he may have found a way out of his current predicament by helping a mysterious robot child escape the dangerous and congested city. But someone from his past has no intention of letting him leave…alive.