Nadia keeps dying and reliving her 36th birthday party. She's trapped in a surreal time loop -- and staring down the barrel of her own mortality.
Russian Doll follows a young woman named Nadia (Natasha Lyonne), who on her 36th birthday gets caught in a mysterious loop. She attends the same birthday party in New York City. She dies at the end of the night. She wakes up the following morning unharmed. Repeat.
As the series proceeds, it gets more ambitious and more complicated in a way that's gratifying to watch. It's still anchored, though, by its sense of place and time, and by the infinite possibilities that a night walking around New York City presents.