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.

Lilya (Marina Zubanova) is an approaching-middle-age singleton who lives with and cares for her grandfather and works at a chicken factory. She is determined to get married soon, but hasn’t quite found the man for the job. Most of the story revolves around various failed dates, her conversations with coworkers and family members, and her innocent stalking of a talented local pianist.