Twins separated at birth; one grows up to inherit the crown of San Marciano, and the other works in a pawnshop in Mexico City.

Musical. Thaddeus (Juanjo Menéndez) is a taxi driver who is about to experience a busy work day. Throughout the day you climb into his cab heteogéneos the more characters, which give rise to the most varied situations. When one of them left in the taxi leaves a baby, Thaddeus will have to find out who's not forget that at the end of the day has a date with a mysterious woman (Concha Velasco), apparently, have to tell you something very important.

Rosa Blanca is a Spanish singer and dancer hired for a show in Mexico. She travels with her ​​twin sister, Blanca, but goes undercover as a surprise in the show. The twins also use their resemblance to confuse Herman, a young Mexican-Rosa Blanca's love, and also live moments of tension when receiving a death threat.

Pili and uncle Angel travel to Mexico to see Mili dancing at her debut in a theater in the capital. When Mili finds out the bad economic situation of her uncle, she decides to seek work. Meanwhile, Pili works in a department store and meets Rodolfo, the grandson of Mrs. Caceres, owner of the store, which she takes for the chauffeur of the lady. In turn, Ms. Caceres hires Mili to dance at her party, where she meets and falls for Rodolfo. Rodolfo, who does not know of the existence of a twin sister, is convinced that the girl in the party is Pili. And the sisters do not know they are in love with the same man, which will lead to an unexpected conflict.

A veteran popular singer comes to town with her daughter in order to achieve success in television. She introduces her daughter to a contest winning one of the top prizes. At the same time, a veteran politician is campaigning to scale the governor's office.

Sally and Jennie are twin sisters who travel the American West with his uncle Nathan who makes his living as a tooth-puller and also sells a cure-all elixir. They travel by wagon and attract the audience with their dances and displays of marksmanship. Unexpectedly and before he dies, the old man manages to gain ownership of a ranch in a poker game. Now, the two girls are the new owners but the land is coveted by several people in town.

A millionaire leaves all his fortune to his older granddaughter. But his two granddaughters are twins and nobody knows who's the older one is.

The lawyer Angela Goñi is working in two cases at once: an man that wants to take to Pilo, a young orphan, tp a protection child school. And Mili, another young woman neglected by his father, a businessman, whose aunt Teresa wants to claim through the courts. Taking advantage of the amazing similarity between the girls, the lawyer makes many things to try to resolve the situation as happy as possible.