A kid with monkey magic escapes a losing war and becomes the impossible ninja: someone who actually survives by outsmarting every trap and enemy thrown at him. The show lives in that space between historical Japan and pure cartoon logic where a child's invention and stubbornness matter more than his size. Watch it if you want adventure that moves fast enough to never waste time on melodrama, where the hero wins because he's clever, not because the plot bent for him.

The story opens just after the battle of Sekigahara, when Tokugawa Ieyasu takes power as shogun of Japan. Sarutobi Sasuke was a renowned ninja who served Sanada Daisuke on the losing side against Ieyasu, and people believed he took his own life while trapped inside a castle. In this telling he actually got away, and Sarutobi turns out to be the name of a whole ninja clan rather than a single warrior. The tale centers on a ninja child in the new era, mixing adventure, comedy and supernatural elements across 24 episodes.