H, Little O, and Baby Em are stuck in the city for the summer with only their pet goldfish--Barracuda, Patch, and Fiss--for company. It's looking like it might be a pretty boring vacation, but one day, something exciting happens. Someone starts fixing up the old fountain down the street--the one Grandpa says horses used to drink from before everyone had cars--and a sign appears: "Calling All Goldfish Looking for a Summer Home." H, Little O, and Baby Em can't wait to send their goldfish on vacation, and the fish, well, they seem pretty excited too. Based on the true story of Hamilton Fountain in New York City.