The girls convince a classmate that Miguel is really cool, even though Andy wrote her a letter.
Maya finds an abandoned letter on Miguel's desk, written to a pretty girl in their class named Esperanza. Thinking that her brother might need a little help in making friends, Maya (with the eager assistance of Maggie and Chrissy) tells Esperanza how wonderful Miguel is. No sooner does Esperanza decide that Miguel is the coolest boy in the fifth grade than Maya learns that the real author of the letter wasn't Miguel, but Andy! Suddenly, the Tres Amigas have a lot of explaining to do.