Finny wants to be Wonder Shark one day because Finny believes that being a superhero is the most important job in the world! But, Papa Shark thinks there are some other jobs Finny should see, and invites Finny to his own job delivering mail around town! On Papa Shark’s delivery route, Finny meets Chef Seymour, Fishcasso the artist, Smokey the firefighter, and Old MacStingray, the farmer. Finny even sees Mama Shark working at the construction site! Did any of their job change Finny's mind?