After Adam finds out that Echo is taking her "little sister" to the school carnival, Adam signs up to be a "big brother" so they can spend the day together. Unfortunately, Derby made a typo on the questionnaire which said that Adam was 41 instead of 14, so Adam ends up with a "little brother" who is older than him. Echo's "little sister" starts stalking Derby while Adam's "little brother" spends a lot of time with Echo.