The premise is absurd on its face. A middle-aged salaryman turns into a robot, and the show treats it like a real problem the family has to solve. Shin-chan's chaos meets domestic crisis, and somehow that collision creates something funnier than either could be alone. The movie doesn't wink at the audience about how stupid the setup is. It commits completely, lets Shinnosuke run circles around a malfunctioning robot-dad, and finds genuine heart in the wreckage.
Shinnosuke's father Hiroshi wakes up one morning to discover his body has been replaced with robot parts. What starts as an embarrassing mishap quickly spirals into chaos when the mechanical upgrades give him superhuman strength and combat capabilities he can't control. As Hiroshi struggles to maintain his humanity while dealing with his newfound robotic nature, Shinnosuke and his family must figure out how to reverse the transformation before things get worse. The catch: someone or something orchestrated this change, and they're not done yet. What unfolds is a blend of absurd domestic comedy and action-packed mayhem as the Nohara household becomes ground zero for a scheme that threatens far more than just one man's body. Shin-chan's characteristic chaos meets sci-fi shenanigans in this wild ride that questions what happens when a father's worst nightmare becomes a superpowered reality. Family bonds get tested in the most ridiculous way possible.