莉拉和阿毛在巴士站相遇，莉拉害羞内向，与生俱来的语言障碍，阿毛活泼外向，总是机机喳喳说个不停，莉拉用功念书，阿毛以非法赛车维生，就像磁铁的二极无法抗拒，莉拉与阿毛互相吸引。由于天生口吃，莉拉被课堂上被同学嘲笑是智障，同学经常模仿她口吃的样子。老师从报告中识出莉拉的文字天份，建议她加入一个诗社，她将说不出口的话语化成一首又一首的诗篇，当短诗发表到部落格，立即引起关注，网友纷纷称赞。她迫不及待想跟阿毛...

Brilliant playwright, Lisa, no longer writes. She lives in Switzerland with her family but her heart has stayed in Berlin, beating to the rhythm of her brother's heart. The ties between the twins ...