Jack goes from destroyed village to destroyed village looking for the ultra-robots responsible for the destruction only to find that they were created by a troll commissioned by Aku.
Made by Genndy Tartakovsky, this cartoon tells the story of a great warrior displaced to the distant future by the evil shape-shifting wizard Aku. The world has become a bleak place under the rule of Aku, segregated into fantastic tribes and ruled by Aku's evil robot warlords. Jack travels this foreign landscape in search of a time portal that can return him to his home time so he can 'undo the future that is Aku!'.
Samurai Jack - XVIII: Jack and the Ultra-robots Synopsis and Schedule