Arale and her companions set out to enjoy a picnic at a pleasant spot, where they come across a lovely stone that holds unusual powers. Their relaxing outing is cut short when a menacing pirate shows up aboard an enigmatic vessel and makes off with the stone. Now Arale and the others must recover it before it can be turned to wicked purposes. This 1999 Dr. Slump film blends comedy and adventure with slice-of-life moments.