After being in a car accident while being transported to prison Antonia, aka "Kachorra," assumes the identity of Rosario Achaval an Uruguayan tutor. Kachorra meets the Moravia family who hired Archaval, and moves into their home.
Kachorra finds it difficult to act normal in the Moravia household not knowing what her new job requires her to do. Meanwhile her family in town worries about what has become of her since no one has heard of her since the accident.
Kachorra goes with Lautaro and Bernarda to the doctor, and manages to contact her family. Bruno and Pablo deal with a strike at the pasta factory. German and Pato try finding where Kachorra is.
Jose insists she needs 400 pesos for a new dress and decides to pawn an old watch to get the money. At the orphanage Sancho and Pitu try to come up with a way to make money for food. Kachorra tries to prove she will be a good tutor.
Kachorra goes to Cata's orphanage and leaves money for her under the statue of the Virgin Mary, in the process she discovers who has the Moravia Family watch. Now feeling she has a better footing with the family she gets a new wardrobe.
With her true identity being discovered Kachorra's fate lies in Pierina's hands. At the orphanage Sancho and Pitu debate going to see Bruno Moravia about the watch.
With the strike at the factory reaching its peak, and the watch being returned under strange circumstances Bruno finds himself struggling to handle his family and work. At the orphanage Cata debates allowing the presence of a strange man.
After Bruno gets attacked Kachorra helps him hide the fact he is in danger. Kachorra's brother, Santi, goes around the neighborhood trying to make money.
Bruno's girlfriend becomes jealous of the fact that Bruno turned to Kachorra in his time of need and not her. The police begin setting a trap for Kachorra to be brought in. Santi brings a news crew to the orphanage to film the miracle.
Pierina and Chichilo help Kachorra meet with her father and boyfriend. The orphanage finds itself overcrowded as many people come to get money from the Virgin Mary, but Bruno and Pablo go to the orphanage to clear up the confusion.
Barely escaping arrest Kachorra returns to the Moravia household beside herself, the police however make everyone think she died. Bruno finds himself worrying over Kachorra after noticing that she is very sad.
Kachorra recounts how she wound up accused for murder. The police hire a rouge detective to track down Kachorra. Sancho and Jose begin working together, but Jose proves difficult to get along with.
Kachorra comes up with a solution to the strike solving Bruno's problems, but class differences between her world and his become evident through Sancho and Jose.
Kachorra continues to recount the events that led to her false accusation. Cata tries to stop her eviction from the home the orphanage is in. The family get a message from Kachorra, but hide it from her father.
Kachorra reveals that she only wanted to blackmail the owner of the building where the orphanage is for the kids to continue to have a home. Jose finds herself getting annoyed of her rich friends after spending a lot of time with Sancho.
Finding himself more attracted to Kachorra, Bruno tries to be alone with her. Bernarda finds herself a complete mess trying to get Reynaldo's romantic attention. Cata tries to get things in order to keep the orphanage.
Kachorra helps Lautaro improve in soccer and ropes in Bruno who is secretly trying to impress her. Bruno also asks Kachorra to go to a party with him, but he asks her for Pablo. At the orphanage everyone has come to love Carmelo.
Bruno finds himself at the party with Kachorra, Pablo, and his secretary. However, Bruno's girlfriend, Mecha, comes back early from her trip and thinks Bruno is cheating on her - with his secretary.
After the disastrous art party Bruno returns to the Moravia Household heart broken. Everyone soon finds out he is newly single and vary in their opinion on the matter. Interestingly, Bruno has Kachorra lie about her being at the party.
Sancho and Jose work over business plans, making Veronica's job more difficult. Kachorra tries to help Lautaro, and find out if Bruno is being honest about the party.
Bernarda tries to get Mecha to forgive Bruno, but Bruno resists telling the truth and has everyone cover up for him. Cata and Angela try to find out what Carmelo is hiding from them.
Having had enough of the drama from Mecha and Bruno's breakup Kachorra takes it upon herself to tell Mecha the truth, and for that she need the help of Pablo.
After being told by Pablo that him and Kachorra are together Bruno finds himself jealous. At the bar Elena tries to get Francisco to go on a date with her, but is thrown off when a party is planned for Silvana instead.
After Silvana's party Germán, drunk out of his mind, begins speaking uncontrollably to Pato about Kachorra. Bruno returns home from spending the night with Mecha, but it makes Kachorra feel very annoyed even though she still misses Germán.
German had an accident at work that leaves him in the hospital. Kachorra tries to sneak out of the house to see him, while her cousin Angela and Cata try to know more about his father.
Going to see German proves to be very risky, as Kachorra must not be seen and run away from Roberto, the detective trying to find her. At the Moravia house everyone is staying up to find out where Kachorra is.
Kachorra makes Pablo lie to have everyone believe she was with him, but this only makes the Moravia men very upset. Carmelo sees German in private revealing he is his father.
The real Rosario Achaval is awake, the police can't wait to speak with her. At the Moravia household Bernarda gets ready to evaluate and test Kachorra. At the bar a love square has formed between Elena, Silvana, Fransisco, and Roberto.
Kachorra, Pablo, Bruno, and Mecha go out for a double date which proves to be very uncomfortable for Kachorra and Bruno. At the same time Careño doubles down on a couple who owe him money.
With proof of Kachorra's whereabouts the couple that owed Careño plan to use her to get out of trouble. Kachorra tries to win Bruno's graces after he is told that she and Pablo were messing around in the living room.
Kachorra goes through her normal day: sneaking out in disguise to see German, rushing back to the Moravia house, going shopping with Lautaro, and going back to the house. Little does she know that someone is following her.
Having failed her test with Bernarda Bruno decides to call the references of Rosario Achaval, much to Kachorra's chagrin. At the same time Roberto visits the real Rosario Achaval to find some information about the crash.
Bruno begins fantasizing about Kachorra while with Mecha causing some friction. Cata begins to waiver her trust in Carmelo. Bernarda searches Kachorra's room and finds a love letter from Lautaro.
A woman posing as a reporter comes to the house to speak with Bernarda acting as if she wants information about the family, but really she is there to know more about Kachorra. Cata and Angela try to make a deal with a lawyer.
Carmelo decides to run away to not face German leaving Cata to pick up the pieces. Kachorra becomes concerned for Lautaro after he begins acting strangely and hiding things from her.
Kachorra's has to go to the police station with Bruno, and doesn't know how to prevent police from recognizing her. Jose spends the day with Sancho and notices his shoes are falling apart.
Kachorra tries to get money to pay her blackmail, while Bruno begins to wonder if she will be a good match for him. Roberto moves into Kachorra's family home, but Silvana has put together he is leading a double life.
Kachorra tries to get money to pay her blackmail, while Bruno begins to wonder if she will be a good match for him. Roberto moves into Kachorra's family home, but Silvana has put together he is leading a double life.
Mecha and Bernarda try to find more information about Rosario Achaval (who is really Kachorra). Kachorra on the other hand debates stealing from Bruno.