In a world ravaged by environmental disaster, retired hitman Zack must take on a dangerous mission to rescue his friend's son... or die trying. Young Tom has been kidnapped by the Kwanon: a ruthless group of extremists who plan to use him as a victim for human sacrifice. Seeing their captives as no more than objects, the Kwanon delight in inflicting pain on their victims. Outnumbered, outgunned and facing both natural and unnatural...