After 50 long years of battling Aku, Samurai Jack has started to slip into madness and finds that his psyche has now become his own worst enemy.
Jack's will to survive is pushed to its absolute limits after a deadly, unseen foe launches a relentless surprise attack.
A gravely injured Samurai Jack chooses to create his own fate by going up against the deadliest foes he's ever faced, Assassins from the Cult of Aku.
Samurai Jack fights to save a group of enslaved people from being harvested as the power source for a monstrous Mega-Robot.
Jack and Ashi must overcome a series of dangerous physical and spiritual tests in order to recover Jack's long lost sword.
The burgeoning relationship between Samurai Jack and Ashi takes an unexpected turn after they find themselves hunted by one of the galaxy's deadliest creatures.
Samurai Jack's worst fear is realized when he faces off against Aku, and the demon makes a shocking discovery about Ashi that puts her in grave danger.