One day on a hike, Fenway finally convinces Hattie to take off his leash so he can run free with other dogs, and as always, keep his humans safe from any squirrels. He has an amazing time and gets treats whenever Hattie calls his name! But the next time Fenway is off leash, things don't go so well. Hattie calls right when Fenway is chasing the most dangerous squirrel in the forest. Then, suddenly, Hattie is missing. Could it be that Fenway needs a leash to keep track of ? With an easy reading level and lively illustrations, emerging readers will be eager to get their paws on the chapter books.