Pepa had been lusted over and impregnated by her landlord Carlos Castro, giving birth to a son and then thrown out of the house and tricked into believing that her child was stillborn.
She finds a shelter in Raimundo Ulloa (Ramón Ibarra) inn where she befriends his daughter Emilia and is hired to be an obstetrician for Francisca Montenegro (María Bouzas), a wealthy landlady whose pregnant daughter-in-law Angustias is mentally unstable.
Pepa finds her real mother, a wealthy landlady who was forced to give her illegitimate newborn child away, as she was also underage, and her father is Francisca's deceased husband.
in 1919, Gonzalo (Jordi Coll), the new priest, comes to the town with a single purpose, to find his real family, it is Martín, the son of Pepa and Carlos who they left for dead in the first stage, he fell in love with María, raised in her godmother Francisca's home, has grown up to be a noble lady from the upper class who becomes a love interest of Fernando (Carlos Serrano) Pepa's step-brother's son, named Olmo and soon they get engaged.
Meanwhile, Tristan is depressed after Pepa's demise, and does not communicate with anybody, except for his father Raimundo, his sister Emilia, his niece María, his brother-in-law Alfonso and his maidservant Rosario.
Candela (Aída de la Cruz), a lonely confectioner who escaped her cruel husband, enters Tristan's life, making him happy again and they fall in love.
After Francisca's unsuccessful plot to murder Martin, Maria gets furious and tries to kill her godmother to put an end to her evil and cruel deeds but is stopped by Martín.
Francisca takes Bosco under her patronage after he saves her life and eventually his origins are revealed due to three moles on his back, possessed by Pepa and all her descendants.
Initially, Francisca refuses to hand the baby over but then she decides not to repeat her mistake with Tristán and lets her love for Bosco triumph over her ego and hatred for Aurora.
Camila's character is her husband's complete opposite: she's kind and caring and soon wins her adopted daughter's heart over while Hernando provokes only fear in the girl despite his efforts of befriending her.
Elías Mato (Jaime Lorente), a chemist working for Hernando, falls in love with Camila and tries to separate her from her husband but eventually, the spouses grow closer to each other.
Later, the family faces new struggles as Beatriz is involved in a love triangle with Matías, Emilia's adopted son and Ismael, her father's new business partner.
Matías mets Marcela (Paula Ballesteros), in a party and impregnate her, for that reason he is obliged to marry with her, that act brokes Beatriz's heart and she goes to bed with Aquilino to make Matias jealous.
The financial situation of the Dos Casas has worsened a lot after the damage that Damián caused and after the departure of Lucía and the arrival of Aquilino, a man who wants to sink Hernando further, he receives a job offer and moves to Czechoslovakia with his family.
Since then Severo tries to avenge the death of his wife and succeeds, but cannot find his son, it is revealed that the baby is in hiding with a journalist, Irene (Rebeca Sala), who unknowingly kept him .
Esperanza and Beltrán are forced to leave for a boarding school due to the dangerous situation that is being caused in the village, between the hatred between Francisca against Severo and Carmelo.
In 1930, workers' uprisings marked the lives of the inhabitants who worked in the mine of the Marquis De Los Visos and in the steel factory of the Solozábal family, two opposite things.
The other family are the De los Visos, who come to the city to manage the mines that the late patriarch bought, and settle in Havana, the former home of Fernando and María.
Unexpectedly, Emilia returns to take care of him, at the same time it is revealed that Francisca is the leader of the Archangels, a secret organization against the Republic to which Donna Isabel, Tomás and Don Filiberto have joined.
In the second, the arrival of Jean Pierre, the Marquise's French mistress, destabilizes the De los Visos family, as it turns out that he is Adolfo's real father and, moreover, the cause of Don Ignacio and Donna Isabel's enmity.
Doña Isabel discovers the lies of Jean Pierre and discovers that he killed his foreman Maqueda; Rosa reveals that her pregnancy is a lie and she, after being on the verge of killing Carolina, is admitted to a psychiatric hospital with her mother Begoña; Emilia reveals that she has an incurable disease and she has little time to live; Adolfo and Marta leave together to start a new life; and Onésimo and Antoñita marry.
Francisca, however, tries to kill Don Filiberto, and the priest, in the grip of madness and fanaticism, fills the town with bombs and Puente Viejo is completely destroyed.
Emilia falls pregnant by a Don Juan named Severyano, a seasonal blue-collar worker in the village who escapes after robbing a wealthy widow's property.
Years later, Emilia and Alfonso adopt a troubled teenaged boy named Matìas (Ivàn Montes), whose father and brothers force him to steal.
Despite Emilia and Alfonso's request for Maria's family to return to Spain, she refuses, not wanting to take risks by revealing Francisca the truth behind their disappearance.
She's proud, refined and kind-hearted lady from the upper class but suffers a lot because of her love for Juan (Jonàs Beramì), son of Francisca's and then Tristan's maid Rosario (Adelfa Calvo) and Alfonso's younger brother, who often gets into trouble.
Both of them try to move on, Juan by hiring a call girl named Enriqueta (Andrea Duro), who falls in love with him, and Soledad by getting engaged to Pepa's step-brother Olmo (Iago Garcìa).
In Paris, she met Enriqueta, now begging on the streets, who revealed her everything about Olmo's true colours, including their alliance and how Juan's murder was part of his plan.
Soledad marries Terence, an American gentleman with dark complexion but falls in love with Simòn (Jonàs Beramì), a blue-collar worker who looks just like Juan.
Their son Hipòlito (Selu Nieto) is a cheerful and vivacious young man with his head in the clouds who experiences difficulties in choosing occupation or hobbies he wants to get busy with, creating, along with his parents, a lot of entertaining situations.