When a group of old college friends, now in their 30s, gather over Christmas at their recently deceased friend's remote mountain cabin to celebrate his life, they see it as an opportunity to come together as the cohesive unit they once were. But time has passed, and as old secrets and resentments surface, they realize that they are more seriously estranged than they had imagine...。老华侨欧阳占携女湄回乡,欲把湄嫁予指腹为婚的乡绅之子王耘。湄爱以村姑打扮在乡间留连,与耘偶遇,二人一见钟情且志趣相投,却不知对方身份。耘父王道行亦钟情于假扮村姑的湄,却纳作填房,遂迫耘履行盲婚之约。耘怒闯欧阳家反对婚事,方发现盲婚对象正是意中人,二人喜成眷属。。故事发生在民国初年的上海,苟吉祥(李小璐 饰)本是一介贤惠勤恳的家庭主妇,却被卷入了一场意外之中,不仅成为了寡妇,还成为了被警方怀疑的重点对象。然而,苟吉祥却并没有因此一蹶不振,她小小的身体里爆发出了巨大的能量,和毛儒毅(贾乃亮 饰)结为搭档,成为了一名英姿飒爽的女探员。
毛儒毅的个性向来吊儿郎当得过且过,日子过得浑浑噩噩,自然和较真而又老实的苟吉祥之间产生了许多矛盾,然而,随着时间的推移,当一个又一个案件终结在他们手中之时,毛儒毅和苟吉祥之间渐渐产生了坚实的情谊,与此同时,他们亦发现了多次阻挠他们调查案件的巡长弗兰克,在他的身后隐藏了一个惊人的阴谋。。