In a brief flashback, three mermaids struggle to find out what is inside the Straw Hat's barrel, unaware it contains Caribou. They manage to open just enough of the barrel for Caribou to escape. The mermaids try to flee to the water, but it is no use. Caribou is able to capture them with the powers of the Numa Numa no Mi. The Straw Hats arrive at Ryugu Palace, where King Neptune is scolded for leaving the palace unguarded. Luffy sneaks off when he smells food. He comes to a large iron door that he mistakes for the banquet hall. Inside, instead, he accidentally meets the Mermaid Princess, Shirahoshi.