Robotic incarnations of pure good and pure evil battle to the death to determine which force is the most powerful in the universe.

Ultimo and Vice are Karakuri Doji, the mechanical embodiment of pure good and pure evil, devoid of human emotions that can cloud one's judgment. Their purpose: to battle to the death to prove once and for all whether good or evil is the most powerful force in the universe.

In a desperate bid to avert disaster, Ultimo’s master Yamato tries to convince his high school crush to join him on the side of good! Meanwhile, Ultimo is challenged to a duel by Vice, and the battle between good and evil resumes in earnest. Will the Karakuri Dôji finally break free of their dastardly puppet master’s grand plan?