The kids from Mr. Terupt's fifth- and sixth-grade classes are entering their first year of junior high school. There's a lot to be excited about, but there are new challenges, too. Peter and Jeffrey face tough competition on their wrestling team. Alexia has a disastrous first day of school, and that's only the beginning. Anna is desperate for Charlie to propose to her mother--what is he waiting for?! Danielle isn't feeling so well, but she's trying to tough it out, like Grandma. Trouble with a bully makes Luke dread going to school for the first time ever. And Jessica is waiting anxiously for an acceptance to a theater retreat in New York City.
Everyone is missing Mr. Terupt. When a fight threatens to break up the group forever, they think their favorite teacher is the only one who can help them. But the kids soon find out that it's Mr. Terupt who needs saving.