The “Black Widow” solo movie isn’t an origin story, but it does delve into Natasha Romanoff’s past. The final trailer for the Marvel film reveals that she’ll seek to destroy the Red Room, where she was trained as an assassin.

In the promo video, released Monday, Marvel reveals more plot spoilers for “Black Widow.” Taskmaster is running the Red Room now and Yelena Belova (Florence Pugh) says that the young women are being fully controlled. “They’re manipulated, fully conscious but no choices,” Yelena explains.

Natasha (Scarlett Johansson) isn’t going to let that fly. “We have to go back to where it all started,” Nat tells Yelena. “So they never do that to anyone again.”

So do we know about the Red Room? The Marvel movies have only delved into the training facility briefly, but it’s clear that it wasn’t a warm and loving environment for children.

In “Marvel’s Agent Carter” Season 1, Peggy (Hayley Atwell) discovered an early version of the Red Room in the 1940s. Girls were handcuffed to their beds at night. They were forced to watch “Snow White and the Seven Dwarfs,” but it contained subliminal messages like “pain” and “fear.” They also had little girls fighting to the death.

In the Marvel Cinematic Universe movies, bits and pieces of Black Widow’s time in the Red Room have been revealed. Natasha started there at a young age and trained in martial arts, gymnastics, tactical skills, interrogation, weapons and assassination.

In “Avengers: Age of Ultron,” flashbacks show Nat was trained in ballet and forced to kill innocent people, like a random man with a bag over his head. She was also sterilized upon graduation to make sure she’d never get pregnant.

The new trailer makes it clear that Taskmaster is in charge, and the girls being trained are being controlled. The villain is clearly sending the assassins after Natasha and Yelena. It also might be noteworthy that, in addition to sporting gear much like Black Widow's, all of the new killers seem to have red glowing bracelets. 

The Marvel comics don’t offer much more in terms of specific details about the Red Room. It’s a training facility that Natasha now views as a torture facility. There are comic book arcs where Nat saves girls from the Black Widow program, and it seems like that’s where the film is headed too. Of course, she’ll have to get past all the people trying to murder her in order to save them.

The idea of Nat decimating the Red Room makes sense. One of the only threads left hanging after Black Widow’s “Avengers: Endgame” death is her origin. It seems like the spring solo movie will answer questions about Nat’s beginnings and see her trying to stop anyone else from having to follow in her path.

The “Black Widow” solo movie hits theaters May 1.

Black Widow The Red Room appears in the "Black Widow" movie. Photo: Marvel Studios