续作延续前一部的风格，讲述在这座加拿大小镇上，开展了一场盛大的雪橇比赛，弗兰基带着他的团队参赛，而索菲亚则担任舵手，除此之外，还有新的成员加入了这场比赛，包括神秘而自负的扎克、以及扎克的运动员表姐查莉....

When the body of the executive of hockey Benoit Brisset is found on the billboard of the border of Quebec and Ontario, the jurisdiction of the crime is shared between the two police forces and detectives David Bouchard from Montreal and Martin Ward from Toronto are assigned to work together. With totally different styles, attitudes and languages.

Simon, who's dreaming of a fabulous world, persuade his friends to come with him to find this mysthic country in the 'third wood'. But, there's a condition: no adult should see them in this adventurous trip or the dream won't come true.

本片故事取材于1984年加拿大家喻户晓的经典电影《La Guerre des Tuques（阻止战争的狗）》，本片在30年前上映时曾轰动一时，在全球超过125个国家上映，获得18种全球奖项。《冰雪大作战》还是首部引入中国的加拿大动画片，同时也是2015年加拿大本土制作的 电影票房冠军。
电影讲述一群生活在加拿大小镇的孩子，在寒假来临时，为了打发无聊的时间，小男孩卢克和刚到搬到镇子上的小女孩索菲亚成为对立两派的首领，约定了一场超大规模的雪仗。雪仗的规模在两方孩子们的挑衅、误会等碰撞中不断升级，进而演变成雪堡保卫战，最后导致了意想不到的事故发生。这个事故最终停止了孩子们的战争，并让孩子们认识到了自己的错误，找到了游戏的真谛，即友情和快乐才是游戏的目的，于是，所有的孩子都在这个过程中醒悟并得到了成长。

George is the scapegoat of his classmates. One day he cracks and shoots them. His best and only friend Blaise is accused in his place and sentenced to 7 years in a psychiatric hospital. At the day of his release, Blaise realizes he only has one family: his best friend George. But he does not want to hear about his childhood friend, as he tries to integrate with the "Chivers" a gang whose members wear red jackets and boots, drink milk, drive sport trucks and play an incomprehensible and violent game that mixes cricket and mental arithmetic.

Hubert, a brash 17-year-old, is confused and torn by a love-hate relationship with his mother that consumes him more and more each day. After distressing ordeals and tragic episodes, Hubert will find his mother on the banks of Saint Lawrence river, where he grew up, and where a murder will be committed: the murder of childhood.