Oxygen is the new currency. Those who have it, survive. Those who don't, die.Following a cataclysmic event, which killed over 99% of the world's living organisms, life on Earth nothing more than a hopeless struggle to survive. The planet is dying and only a handful of cities around the world remain. Humanity is on the brink of extinction.Living in a rundown part of town of a once hyper-connected city, recovering drug addict, Kade Casey is a rider for hire. With fleeting memories of better times, Kade clings to a sliver of hope that one day he and his sick mother will be safe.Kade's main employer, a ruthless dictator who controls the city, has a new assignment for him - deliver a mysterious package of great value to a neighbouring city. The payment is ten times the amount of any previous job. A tempting offer, but Kade assesses the risks. Along the way are endless dangers from lawless bands of scavengers, environmental hazards, equipment failure, and overcoming physical limitations.When Kade refuses the job, he is beaten and his mother's life is threatened. On the run, a bounty is placed on his head by a vengeful criminal mastermind, the whereabouts of a mysterious package may be the only thing keeping him alive.