It’s the start of fifth grade for seven kids at Snow Hill School. There’s . . . Jessica, the new girl, smart and perceptive, who’s having a hard time fitting in; Alexia, a bully, your friend one second, your enemy the next; Peter, class prankster and troublemaker; Luke, the brain; Danielle, who never stands up for herself; shy Anna, whose home situation makes her an outcast; and Jeffrey, who hates school. Only Mr. Terupt, their new and energetic teacher, seems to know how to deal with them all. He makes the classroom a fun place, even if he doesn’t let them get away with much . . . until the snowy winter day when an accident changes everything—and everyone.

故事就從雪山小學五年級的七位小朋友開始。潔西卡，是新來的女孩，聰明又敏銳，不過很難融入大家；艾莉西亞，是個惡霸，翻臉跟翻書一樣快；彼得，班上的小搗蛋，專門製造麻煩；路克，是班上的頭頭；丹妮爾，從來不會表達自己的意見；害羞的安娜，她的家庭狀況讓她成為棄兒；還有傑弗瑞，他最討厭上學。只有新來且充滿活力的特羅特老師知道如何與他們相處，即使他不會讓大家為所欲為，但是他也讓整個班級變得非常有趣，直到某個下雪的冬天，一場意外改變了一切，改變了所有人。