In 1983 Soviet Kazakhstan, a woman drops her baby from a burning building into the arms of a stranger. That child, Natasha, is raised in the Red Room—a brutal spy program that surgically enhances her into the perfect assassin, the Black Widow. After a massacre forces her to flee, she hides in New York as a gardener and poker player. But her past follows her when a Russian operative kills her roommate. Forced back to Kazakhstan, Natasha reunites with her broken foster father, leads an army of child escapees, and destroys the Red Room in a nuclear firestorm—finally earning her freedom.