Shinnosuke discovers a mysterious black orb and thinks nothing of it until his baby sister Himawari accidentally swallows the thing whole. Turns out this marble isn't just any random trinket: it's a crucial component in a dark ritual meant to resurrect a malevolent demon, and several competing ninja clans will stop at nothing to get it back. What follows is pure chaos as the Nohara family finds themselves caught between warring factions, each desperate to retrieve the orb before the summoning can be completed. Explosions, ridiculous disguises, and Shinnosuke's complete obliviousness to the danger around him make this disaster hilarious rather than terrifying. The movie balances genuine action sequences with the show's trademark humor and absurdist sensibility, creating something that works equally well if you're here for the gags or the surprisingly inventive set pieces. It's Crayon Shin-chan at its most unhinged, mixing slapstick comedy with surprisingly creative ninja battles that don't take themselves seriously for a second.