After discovering the man who raised him is not his biological father, 15-year-old Ian's world is forever changed. His mother refuses to identify his real father, fueling Ian's desire to escape suburbia. His girlfriend urges him to stay and work things out, while his best friend continues to lead him down a violent path. The duo sell drugs to make money – until their dealer offers an easier, deadlier way to get rich quick.

In a fallen world, ravaged by an incurable epidemic and violence, a nomadic figure (Jericho) seeks revenge at all costs, for the murder of his family by a ruthless gang called the "Sandflies".

This is the untold story of The Exorcist, a chronicle of true events based on the priest's secret diary the world was not to see.