Blanca Guerrero (Lisette Morelos) is a cheerful and resourceful girl with a big heart, who works as a waitress dreaming of an acting career. At an early age, she began helping her father Memo as much as she could, due to her mother's early death. When Memo is unjustly fired by Raquel Altamira from his job at her family's company, where he worked for years, Blanca decides to go to the Altamira's end of the year costume party and notify Don Leonidas, the company's owner of the situation with her father, and hopefully convince him of rehiring him, and thanks to her amazing acting skills she is able to sneak her way in.
At the party, Blanca meets Eduardo, the very shy yet romantic son of Raquel, with whom she shares a passionate kiss at midnight, all while hiding her identity. The party goes however awry when Adriano Ferrer (Manuel Landeta), a rich businessman, crashes the party to reveal a secret affair, and child that he had years prior with Valentina Altamira, Raquel's younger sister. Adriano also accuses the Altamira family for the death of his young love Valentina, not knowing that she is actually alive, but is being detained in a psychiatric hospital by orders of her older sister Raquel.
A few days later, Adriano finds out that Memo, Blanca's father knows the truth about what happened to his and Valentina's child and goes to visit him at his home, but finds Blanca, the girl that had helped him while at the party days before, and she tells him that her father is in the hospital after being run over by a car. That same day, as Adriano goes to visit Memo at the hospital, he runs into Blanca disguised as a nurse and makes her an offer she can't refuse, promising her to help her pay her father's medical bills if she becomes "the impostor", helping him uncover the truth of what really happened to Valentina and his child. In the process, Blanca has to become Victoria San Marino, a millionaire investor from New York, get into partnership with the Altamira family and
Selon la légende du baiser de l’amour éternel, si deux inconnus s’embrassent le jour du nouvel an à minuit, ils s’aimeront toute la vie et rien ni personne ne pourra les séparer. À leur insu, Blanca et Eduardo seront touchés par cette légende. Ils s’embrasseront passionnément pendant les douze coups de minuit sans réaliser que, dès lors, leurs destins seront liés à jamais à la guerre brutale que se livrent Adriano Ferrer et Raquel Altamira.
A história narra a vida de Blanca Guerrero (Lisette Morelos), uma garçonete em Puerto Vallarta com habilidades para imitar outros. A White Day é contratado por Adriano Ferrer (Manuel Landeta) um empregador de alta potência, para representar um investidor milionário de Nova York,ela não aceita de imediato, mas ao vê seu pai Guillermo "Memo" Guerrero (Paco Mauri) com risco de morrer em casa por falta de cuidados médicos e a falta de dinheiro faz Blanca voltar atrás em sua decisão e aceita a se transformar em Victoria San Marino. A missão de Blanca é se infiltrar na família Altamira para descobrir o paradeiro do filho desaparecido de Adriano. Mas as coisas se complicam quando ela conhece Eduardo Altamira (Sebastián Zurita) filho de Raquel Altamira (Christian Bach), com quem vai viver uma história de amor.
La Impostora es una novela llena de amor, intriga y emociones, en la que las apariencias engañan. Es la historia de Blanca Guerrero, una bella mesera de Puerto Vallarta, que se destaca por sus extraordinarias habilidades para imitar a otros. Un día, Blanca es contratada por un importante y poderoso empresario de nombre Adriano Ferrer, para hacerse pasar por una inversionista millonaria de Nueva York.
