Dominika Egorova is a prima ballerina who suffers an injury that ends her career. She gravitates to Sparrow School, a secretive intelligence service that trains young people with exceptional minds and bodies in the art of seduction and combat. She emerges as the most dangerous Sparrow after completing their grueling training, but as she comes to terms with her newfound abilities, she meets a CIA agent who tries to convince her that he is the only person she can trust.