Paulina and Paola , two women alike physically but very different emotionally,stumbled on each other and realize how equal they were. Paola Bracho is a vain, heartless, selfish woman, married with Carlos Daniel, a bankruptEntrepreneur, blindly spellbound by Paola. She betrays him with many other men, but he didn't realize it.In one of her long trips, Paola stumbles on Paulina, and realizes they are alike, but Paulina is very poor, and works in a restaurant restroom.Soon, Paola's fertile mind, has the idea of sending Paulina to Bracho's house for 1 year, so she could take advantage of a long trip with her lovers, while Paulina pretends to be Paola at Brachos house. Paulina surely doesn't accept, but Paola racketeers her with her dirty methods and finally she persuades Paulina to accept her plan.At Bracho's house, Paulina pretends to be sick, so being sick, she could't sleep in the same room as Carlos Daniel. It proves that she has greatness, but she can't hold her feelings and she falls in love with Carlos Daniel, even though, she refuses to slepp with him..Time goes by, and Paulina had become a strong basis for Bracho's family, integrating every member of Bracho's family, and making them happy, but not to Carlos Daniel, that denys the new honest and great Paola Bracho. It hearts Paulina, because she loves him more and more.Paulina remakes Bracho's Company, and makes it grow again, winning the love and respect of everybody at Bracho's house, but not Carlos Daniel' s.The time limit fixed by Paola was expiring and Paulina decided to run away, so she started to work as a nurse in an old lady's house. Carlitos, Carlos Daniel's son runs away either to find Paulina, but h efalls over a hill and looses his memory, but he is found by good people who tries to help him to find his family. Paola comes back home, and everybody realizes that she's the real Paola, but soon she gets fed up Bracho Family, and she runs away with her lover Douglas Maldonado. When Paulina finds out what happened with Carlitos she decides to go back to Bracho's house pretending to be Paola, to find Carlitos.Finally Paulina finds Carlitos, but everybody thinks she was the one who kidnnaped him. Leda tells the Police Paulina kidnnaped Carlitos, and they go to Brachos house to take Paulina to jail, but Carlos Daniel protects her, telling everybody she's Paola. Paulina can't stand more lies, and she goes to the police to tell the truth, and goes to jail for a while. During she's on jail, Carlos Daniel realizes he loves her, and he tries to take her out of that place, but she doesn't believe him. During her judgment , Paola appears and tells that everything was Paulina's fault, and Paulina agrees because she thinks Paola is sick, but an ancient Paola's lover who met Paulina in Cancun (where all this story got started) tells everybody the real story and Paulina is finally absolved. Paola tries to run away but her car crashes and she goes to the hospital, and Paulina stays with her all the time. When Paola is about to die, she asks Paulina and Carlos Daniel to forgive her, and she asks Paulina to be happy with him.After Paola's death, Paulina accepts to marry her lawyer Edmundo Serrano, but when she's about to get married, she gives up, because she knows she loves Carlos Daniel.When Carlos Daniel finds out what happened, he goes to Paulina's place and asks her to marry him, and she finally accepts, and so they have a lot of children, and they'll surely be happy forever.