在新疆無垠的靜謐雪原上，一個逃離都市的年輕女孩，與一個將回憶鎖進信箋的孤獨老人，意外成為彼此的“臨時家人”。他們一個學著與過去和解，一個學著向未來敞開，在極致純凈的天地間，共同寫就一封關于溫暖、陪伴與重新開始的冬日治愈詩篇。

　　擔任臨時教師的君島穗香(澀谷凪咲)，目擊了一個女學生從屋頂跳下的瞬間。當她在暑假補習班上課時，又注意到有個不應該存在的學生。不久后，穗香與補習班的三浦瞳(早瀨憩)、前川武(山時聰真)等學生們，得知了與那個女學生有關的令人震驚的事實。

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　　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.