Jim and his mouse friend Gran toll away working as innkeepers. They dream of sailing far away on their own boat. One day, a mysterious fellow appears at the inn and gives them a map. It's the map to Treasure Island. So they decide to make their own boat, and sail away treasure hunting. But it’s not as easy as they think when the run into a group of unsavory pirates led by the dastardly Captain Silver. Silver wants the treasure for himself, and it is up to Jim, Gran, and their new friend Kathy, to beat him to it.
Two baby girls were born in the same hospital: one of them is the daughter of an aristocratic family while the other belongs to a depraved household which lives in the slums of the city. However, the nurse-in-charge, Michiko, secretly switches the two babies due to a personal grudge, resulting in a change of fates of the girls from then on. Many years later, the lives of the two girls continue to be intertwined with each other, with the rich Miki ill-treating the poor Nozomi, yet both of them hold similar dreams to become a singer.
Note: Episode 26 is unrelated to the story, and instead is a live-action episode that focuses on the production and background of the anime. It was never included in the VHS/LD/DVD releases.
