張有誌是一個農民工子弟學校的老師，在他處理學生偷錢事件的時候，突然接到奶奶去世的電話。腦海裏閃現出奶奶陪他成長的一件件事。奶奶一直堅定地告訴別人，“你不是他們說的壞孩子”。[1] 童年有誌被媽媽送到陌生的鄉下奶奶家，麵對突如其來的陌生環境，有誌產生的強烈的排斥感，他不肯和奶奶交流，隻和他帶來的那隻他爸爸送給他的小狗交談。因為對於鄉村環境的種種不滿和不適應，他用各種荒唐胡鬧的行為來為難奶奶，他倒掉奶奶給他精心準備的飯菜，隻吃自己帶來的零食，因為奶奶喂了他的小狗，他就弄濕奶奶睡覺的被子等等一係列的惡作劇，對此奶奶都沒有責怪他，反而給了他最大的包容，在同村小朋友對他排斥而打架後，是奶奶保護了他。 但是這一切依舊無法到動搖他要回到父母身邊，要有一個完整的家的決心。奶奶為了有誌家的夢想，強忍喪子之痛，自己一個人默默承受著。正當有誌要決定留下來，要和奶奶一起生活時，一個更大的秘密也因此揭開。原來，是關於有誌父親的身世之謎。 When Youzhi was young, his mother sent him to his grandma’s home in the unfamiliar countryside. Facing the sudden change in environment, Youzhi refused to talk to his grandma because of the strong sense of exclusion. At the beginning, Youzhi only talked to the dog he brought with him. Due to the dissatisfaction to the rural environment, Youzhi used all kinds of absurd behaviors to embarrass his grandma. For instance, he dumped the meals his grandma prepared and only ate his own snacks. He also poured water on his grandma’s bed because she fed his puppy. His grandma, however, did not blame him. Instead, she gave him the greatest tolerance. And she even protected Youzhi when he fought with other children in the village. However, all of grandma’s efforts were unable to change Youzhi’s determination of going back to his parents for a reunited home.Due to Youzhi’sexpectation of a complete home, grandma had been enduring the grief of losing her son alone. Just when Youzhi decided to stay with his grandma, a greater mystery revealed, which was about Youzhi’s father’s birth.