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 finds a booby-trapped labyrinth, in the center of which is a diamond which could send him back to his own time. But a mysterious stranger, who has also entered the maze, could put Jack’s plans in jeopardy.
While investigating the destruction of several scattered villages, Jack learns that Aku’s new “ultra-bots” are responsible. Unable to destroy them, he receives assistance from an unexpected source: their creator.
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.
While continuing on his mission, Jack is followed by an overly friendly creature who accidentally thwarts his every move. To make matters worse, he’s attacked by robotic bounty hunters.
While ascending a mountain, Jack encounters a hidden society of warriors who have fought a nearly 500-year war against an army of robots and offers to help them put an end to it.
Three short stories about some of Jack’s confrontations. He confronts a two-headed riddling worm, a family that feeds on metal, and a gargoyle who is imprisoning a fairy.
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.
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.
