Japanese anime feature. Robotics expert Dr Otoi builds a robot called Signal to be a companion for his grandson Nobuhiko. But a mechanical glitch means that every time Nobuhiko sneezes, Signal is transformed from an adult robot, into an adorable chocolate-loving baby. Things get even worse when Pulse, one of Dr Otoi's previous creations, is reprogrammed by a mysterious rival to steal Otoi's secret robot technology. Can Signal protect the family against such a dangerous threat?