The world has become too crazy for Pepa Guindilla. It seems hell-bent on teasing her. For this reason, Pepa makes a decision: everyone's to be examined! Adding or removing points will be the only way to control a family. And incidentally also Hateful Snitch, neighbor and archenemy, who will continue to hang around the block. With the new course, Pepa will have to adapt to some changes. Changes at school, at the dentist, at her father's and her mother's houses, and even at the neighborhood bookstore! Pepa knows that life surprises, that's why she has to be very alert. Especially on Thursdays. Since the important things, as everyone knows, always happen on Thursday.