Rogelio (Gonzalo Vega), a relatively inexperienced actor, is approached in Mexico City by the architect Sergio (Manuel Ojeda).
Sergio hires Rogelio to travel to Aguascalientes and impersonate Adrián, the long-lost son of Don Alberto (Ignacio Retes), an elderly and paraplegic man confined to a wheelchair.
Don Alberto is cared for by Adriana (Isela Vega), a distant niece who mysteriously appeared in his home one day.
Sergio and Adriana wish to marry, but they are unable to do so because Don Alberto opposes the idea, fearing he would be left alone.
Over the years, Adriana have maintained a web of lies to deceive Don Alberto, including fabricating a trip to Spain where they previously hired another actor to impersonate Adrián.
However, a complication arises with the presence of the nosy Yolanda (Margarita Isabel), another niece of Don Alberto.
One day, Adriana can no longer resist and visits Rogelio in his room, where they engage in oral sex.
(This exchange takes place in one of Don Alberto's clothing shops while Rogelio helps Adriana handle a naked mannequin with no genitals.)
Adriana asks Rogelio to return to Mexico City, explaining that things have changed and she no longer needs his services.
Desperate for her attention, Rogelio continues to act as Adrian and goes to the shops, giving the workers outrageous raises.
Rogelio tells Daniel he allegedly knows Adriana's secret: Adrian doesn't exist.
The film was first screened at the Instituto Francés de América Latina in Mexico City, but due to censorship it did not have a commercial release until 1983.