The Girl Searching for the Yagara! Great Investigation in the Water Metropolis!

Luffy and Chopper help a girl named Abi to search for her lost yagara bull, which had appeared to her in a dream. During the Aqua Laguna, her family had left their 100-year-old bull at home. When they returned after the storm he was gone. The three search all over the city for him with no success. Another yagara claims to have heard the missing one's voice. After finding a piece of his scarf, they track him into the underwater passages of the city. However, they only find an illusion. Abi is devastated. Then, they hear the voice of a yagara baby wrapped in the rest of the old one's scarf.