本片的故事叙述当Prickly校长的车子被卡在大雪中动弹不得的时候，盛怒之下他居然把一切的过错都怪罪在T.J.等下课後五人小组的身上，但是当他和老师们事後冷静回想，才发现这群孩子平时虽然顽皮，但是也很惹人疼爱，一直以来他们曾经共同度过那麽多美妙的日子，而在这个充满温馨气氛的圣诞佳节之中，大家更应该好好珍惜才是！

Everyone's favorite fourth graders have graduated! It's an all-new school year for the kids — and the gang hits the fifth grade running! But they're stopped in their tracks when they discover some unwelcome changes — no pizza, no playground... no lockers! And to make things worse, their teacher turns out to be the cantankerous Miss Finster! It's all too much for T.J., who is determined to find a way to stand up for what the gang believes in and improve the school they love! The fifth grade brings out the best in everyone... even Miss Finster and Principal Prickly!