45岁的王蕾(贾静雯 饰)的女儿,同样17岁的白白(程予希 饰)令他们的人生再度交错,45岁的林克铭(任贤齐 饰)突然收到网上传来的一封信,一封似是迟来的、王蕾的信,让他再度忆起,那份纯情的年少时光、那段属於十七岁的狂妄 ,还有那份寂寞的遗憾......十七岁 ,好久不见,《十七岁》电影插曲任贤齐贾静雯对唱的《First of May》 让人听了不禁感到伤感。滞闷的高中校园,17岁的林克铭和王蕾因为一场英文演讲比赛而拉近了距离,懵懂的情感才刚萌芽就在年轻的羞涩与突来的事件中错过而结束,没想到20多年后,因为王蕾17岁女儿(白白),令他们的人生再度交错。45岁的林克铭,突然收到了王蕾的信,这回信晚了20多年,却让他忆起那段青春,回忆汹涌而来,他不由自主的想找出悬在心头的答案。《十七岁》留下了很美好的回忆,即使青春有过失误,那也能让人无比怀念。
When I was small, and Christmas trees were tall, we used to love while others used to play. Don't ask me why, but time has passed us by, some one else moved in from far away. Now we are tall, and Christmas trees are small, and you don't ask the time of day. But you and I, our love will never die, but guess we'll crye first of May. The apple tree that grew for you and me, I watched the apples falling one by one. And I recall the moment of them all, the day I kissed your cheek and you were mine. Now we are tall, and Christmas trees are small, and you don't ask the time of day. But you and I, our love will never die, but guess we'll crye first of May. When I was small, and Christmas trees were tall, do do do do do do do do do... Don't ask me why, but time has passed us by, some one else moved in from far away.