The film tells about the personal experience of the Black Widow before the "Infinity War" starts. Scarlett Johansson reappears in his shirt and plays the "Black Widow" Natasha Romanoff. With the emergence of new rivals, the undisclosed experience of Black Widow before becoming a member of the Avengers has surfaced, and the dark past of this first-generation reunion heroine is about to be unveiled. A force that would knock her down at all costs came, and Natasha had to face her past as a spy long before she became an Avenger, and the broken relationship she had been far away from.