13岁的少女李玩，由于父母离异，与爷爷奶奶生活在一起。正处于青春期的她渴望了解、陪伴和爱。在“要听话”的中国式教育里，李玩也完成了属于她的“成人礼”。电影中，父亲希望通过一条宠物小狗完成与女儿的和解与沟通，李玩为狗取名“爱因斯坦”，暗潮涌动的青春因“爱因斯坦”意外走失，开启了它汹涌又无奈的成长之路。Twelve year old Li Wan (Zhang Xueying) has lost her mother long ago. When she grew up, her father remarried. Not long after, Li played with a half brother. This series of events lead to adolescent Li play has become strange and silent, in order to appease and divert the daughter inside depressed, father bought a lovely dog, hoping it can replace himself with his daughter. Li Wan and the puppy soon established a deep affection, she named the puppy "Einstein"". Unfortunately, an accident, Einstein lost, under a huge blow, Lee with his wayward will play the whole family jiquanbuning exhortations. After the father sent Lee Wanyi puppy to replace Einstein, but Li Wan knew that everything changed, he could not go back to the past, compromise, seems to be the only choice.