Blending dramatic situations with a documentary-influenced visual style, Happy Birthday looks in at a typical day in a Russian maternity hospital. The patients range from a middle aged woman pleased if surprised by her current pregnancy to a Muslim woman whose marriage to a Russian has blighted her relationship with her family. No matter what their situations, the women draw strength and support from each other as they share their common experience.

莉莉亚（玛丽娜·祖巴诺娃饰）是一个在鸡厂工作的中年单身女人，与祖父一起生活并照顾他。她决心尽快结婚，但一直没有找到适合的男人。故事围绕着各种失败的约会、她与同事和家人的谈话以及她对当地一位才华横溢的钢琴家的跟踪。