A scientist, his son, and an incomplete robot are sneaking away from the scientist?s psychotic wife. Along the way, the son gets out to satisfy an urge of nature, and comes back with a cat that found him. At this point, gunfire erupts around them, and they try to get away. They succeed, but the cat had been killed by a stray shot. Sometime later, the son is going to school with his "big sister" named Nuku-Nuku. Yes, this is the robot (who now looks like a cute girl) with the brain of that cat. Of course, things don't stay peaceful for long; the boy's mother wants him back! A fast-paced action comedy.