Lupita and Toña work as housemaids at the Ruíz Palacio’s house, an aristocratic Mexican family. For a long time they have been mistreated and poorly paid. They’re now fed up with the abuse and lack of respect they get from their employers.
Polito is the manager of a courier and parcel branch in Yucatán, who seeks to fulfill his dream of receiving a promotion and having a place in Cancun to move in with his wife Teo and son. Pressured by his wife, he will be willing to do anything to get it and he plans a strategy where he will achieve his transfer but a little further north: Tijuana.
In 1971, four women defy ultraconservative norms and join Mexico's first female police force—only to discover that it's a publicity stunt to distract the media from a serial killer. As the body count grows, they make a pact to bring the killer to justice.
