In the plum rain season, within an ancient town south of the Yangtze River, each of them bears their own troubles, their thoughts trapped in time. On a stormy night, four people meet by chance in a small noodle shop, only to find they are long-lost acquaintances.

九〇年代的美国，和家人初移民的小姊姊梁芬，渴望融入新环境，而迷恋着当时女孩间流行的彩色蝴蝶发夹。梁芬对蝴蝶发夹的执着，混杂着对俗气妹妹的厌恶，使得母女三人新生活下隐含的张力一触即发。