Angered by the failure of his bounty hunters and mercenaries to defeat Jack, Aku uses the samurai’s inner darkness to create an evil clone whose sole purpose is to destroy him.
Seeking to weaken Jack’s popularity among his subjects, Aku gathers the children of the world in his palace and tells them a series of “fairy tales”, all of which portray himself as a hero and Jack as the villain.
Aku leads Jack into a cursed graveyard, where he is attacked by an army of undead warriors. Jack defeats them, but then discovers Aku’s true plan: kill Jack with his own sword.
Aku summons the three immortal servants of Set to destroy Jack while he travels through Egypt. To destroy them, Jack must assemble a golden scarab using clues from his time as a young boy.
Armed with various weapons and traps, Jack single-handledly defeats Aku’s “beetle-bots”. He subsequently vows to fight the demon’s oppression until he can return to the past.
When Jack hears rumors of a time portal being found in the underwater city of Oceanus, Jack sets out to the city and is welcomed by its Triceraquins, but is unprepared for a terrible surprise.
Jack must chase a mysterious thief who stole his clothing while he was bathing, but things get complicated when his pursuit leads him into another world, whose denizens could gaze on his nudity.
Jack survives a series of traps and encounters a Viking king transformed into a giant rock figure by Aku, who insists that Jack slay him in battle so that he can reach Valhalla.
Jack is transformed into a chicken after bumping into a cranky wizard and winds up being captured by a greedy man (Luther Creek) who seeks to turn him into a prizefighter.
Centuries ago, the demon Aku is accidentally released by Jack’s father, who receives a magic sword from the gods. Eventually, he uses the same sword to imprison Aku beneath the earth.
Five of the world’s greatest bounty hunters gather to compete for the chance to kill Jack. A sixth hunter, revealed to be the princess of a fallen kingdom, persuades the group to work together instead.
The samurai is plunged into a dystopian world ruled by Aku, adopting the name “Jack”. After getting in a fight at a nightclub, he is hired by a group of canine miners to protect them from Aku’s forces.