The class was paired together for a homework assignment, in which they had to bring two items that were related to one another, though Arnold and Keesha forget about the assignment. In a last moment effort, all the two could come up with was a tuna fish sandwich and an old, soggy boot, though when Ms. Frizzle claims to see a wonderful connection between the two, she decides to take the class on a fieldtrip in order to show her what she means.