The sci-fi-action picture The Challenge unfolds on a post-cataclysmic Earth, long after the decimation of contemporary society. Where towering metropolises once stood, now only ghostly vestiges remain - abandoned, rotting buildings, populated by packs of bellicose warlords who wield power through fear and intimidation. Against these forces, small bands of warriors unite, but mankind's only substantial hope lies in the hands of Jonas, a street urchin who holds the last, dying secrets of ancient martial arts. Now, Jonas must use his skills to defeat the warlord Bosco and reorient mankind's destiny from destruction to rebirth.