When the ancient evil Aku returns to terrorize Japan, the emperor's young son is send to distant lands to train in the ways of the warrior. Only then can he wield his fathers magical sword to stop Aku from taking over the world.
While hunting for food, Jack helps the tiny Chritchellites recapture an escaped Woolie. But once they invite him back to their village for dinner, Jack begins to suspect an unbalance in the pecking order.
Samurai Jack hooks up with a group of scientists who are secretly building a rocket to escape from Aku's service. When they hear about Jack's predicament, the scientist come up with a way to send him back in time.
Samurai Jack is crossing a seemingly endless rope bridge when he meets another wanted man coming from the other side: the Scotsman. After fighting each other to a stalemate, they are forced to team-up when bounty hunters arrive on the scene and shackle Jack and the Scotsman to each other.
Samurai Jack gets an offer to join a Thirties style gang of mobsters at the Blue Monkey club and decides to take them up on it so he can get close to Aku. The gang plans to steal something Aku has been unable to obtain: the legendary Neptune Jewel, guarded by Earth, Wind and Fire.