古城苏州，四位毕业多年的大学同学重新聚首，他们分别是白羽（郝蕾 饰）、周琦（赵涛 饰）、马强（郭晓冬 饰）和唐小年（王宏伟 饰）。当年对文学和诗歌的共同爱好让他们走到一起，并筹办了杂志《这一代》。风华正茂、指点江山的青葱岁月早已不再，而今为了生计各自奔波，任风尘掩盖身心。借着为纪教授庆生的机缘，好友们久别重逢，他们打球、闲逛、聚餐、搓麻、泛舟。在这座千年古镇，时间仿佛凝滞了一般，缓缓流淌的河水，销蚀着彼此的容颜，而深藏心底的情感长久驻留，似乎从未改变。　阔别十年，那份笃定的感情在河水的浸渍下悄悄苏醒……

An ancestral city; through its delicious botanical garden and its branched canals, we observe the clues and traces of its ancient culture. Two couples of men and women, former lovers, meet again one year later. The yesterday's breath of youth is still perceptible in their conversations. Is it still possible for us to love? Does youth really have an end? Like the networks linking the old city, what type of ecological existence does their culture require? Written by Venice Film Festival

Quatre amis poètes, portés par les idéaux de la jeunesse, se retrouvent pour fêter l'anniversaire de leur ancien professeur de littérature.