It's time for everyone in Ms. Rooney's room to make cards for the Valentine box. Emily Arrow couldn't be happier when Dawn Bosco gives her some colored stars to decorate her cards. She plans to make a special one for Ms. Vincent, the new student teacher.
But things take a turn for the worse when Ms. Rooney asks Emily to be class monitor. Emily feels important sitting at the teacher's desk, until Sherri Dent leaves her seat without Emily's permission. Emily reports her. That's when Sherri tells Emily, "You'll be sorry."
Emily is really worried. What will Sherri do to get even?