Impressed with Mary's English skills, Juli tries to hook her up with a position tutoring her classmates while Aurelio experiments with an English-learning method of his own.

When the events following their initial shock lead to friendship with an eel they encounter in the river, Guillermina and Candelario learn not to judge a book by its cover.

Guillermina and Candelario enjoy the afternoon sailing on a boat. Grandpa talks about the importance of learning to laugh at yourself. Guillermina will soon have the chance to prove that she can follow her wise grandpa's advice.