Nana (Anna Karina), a beautiful Parisian in her early twenties, leaves her husband and infant son hoping to become an actress. Without money, beyond what she earns as a shopgirl, and unable to enter acting, she elects to earn better money as a prostitute. Soon she has a pimp, Raoul, who after an unspecified period agrees to sell Nana to another pimp. During the exchange the pimps argue and Nana is killed in a gun battle. Nana's short life on film is told in 12 brief episodes each preceded by a written intertitle.