Samurai Jack Samurai Jack tells the story of an unnamed young prince from a kingdom set in feudal Japan, whose father was given a magical katana from three gods — Ra, Rama, and Odin — that he could and had used to defeat and imprison the supernatural shapeshifting demon Aku . Eight years later Aku escaped, took over the land, and held the Emperor hostage, but not before the prince was sent away by his mother to travel the world and train so he could return and use the magic sword to defeat Aku. On his return, the prince-turned-samurai faced and almost defeated Aku, but before he could land a finishing blow, Aku placed a time travel curse and sent him into the distant future, anticipating that he would be able to deal with the samurai by that time