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|When Aku, an evil shapeshifting demon, devastates a boy prince's land in feudal Japan, the prince is sent around the world to train to become the ultimate samurai warrior. He returns home as a young man and sets out to use a divinely-crafted katana previously wielded by his sage father, the unnamed Emperor, to slay Aku. Before the prince can strike the killing blow, Aku opens a time portal to send him eons into the future, where the demon rules the world. The samurai adopts the name "Jack" upon hearing locals repeatedly refer to him as such and vows to fight Aku's oppression until he can return to his own time and undo Aku's future. Not only is the inventive series famous for bringing many artistic and technical innovations to animated cartoons, such as slower, more cinematic pacing and extended stretches of time without any spoken dialogue, it teaches audiences to value hard work and persistence even when goals are seemingly out of reach. Likewise, it draws a clear distinction between Jack as a paragon of good (if not a Christlike figure) who values family, friendship, and unity , and selflessly helping people in need above all else; and Aku as the ultimate form of evil (analogous to Satan), who compulsively , nihilistically, and relentlessly pursues his selfish ambitions because he cannot stop his own diabolical nature. In a few episodes, Jack collaborates with a brutish and boisterous but well-intentioned, unnamed Scotsman who is his sole equal in melee combat and subtly promotes the Second Amendment by using a submachine gun as both a prosthetic leg and a supplemental weapon.