Valerie (Belén Fabra) is a middle-aged girl who stays with her grandmother Abuela (Geraldine Chaplin). The Grandmother expresses regret that she got married to Valerie's grandfather. If she had a choice, she would not have married & have had sex as much as she can. Val is tormented & decides to write a diary.She lost her virginity at 16 & loved the experience of sex with her first partner Eduardo. Even 14 years later, she loves Sex & likes to experiment with as many sexual partners as possible in as many positions as possible. Val loses many partners as they can't keep pace with her sexual appetite. She is late to work due to her late-night sex sessions with different partners. Her coworker friend tries to talk her out of her wild ways & to look for love.When a particularly stable lover, Alex, leaves her, Val is depressed & goes out & has sex by a random guy she meets at a bus stop. She gets fired at work.Then her grandmother dies & Val is alone for the first time in her life. While appearing for job interviews, she meets Jamie Rajas, (Leonardo Sbaraglia) who asks her out on a date & refuses to hire her in his company as he really likes her. Val falls in love with him without even having slept with him.But the first time she does sleep with Jamie, he is really quick & Val has a terrible time. Jamie is really rich & gets her a brand-new apartment & treats her very nice. The sex is still not great, but Val really believes that Jamie loves her dearly & is devoted to him. She wants to pay for the house that Jamie bought for her & she gets a job at a fashion firm with an Italian Boss, Harry. But Jamie is really upset & feels jealous. He even insinuates that Val got hired because of her sexual appeal rather than her qualifications. Jamie's obsession gets worse & he even barges into Val's workplace & threatens Harry of trying to sleep with her.Val meets her previous lovers & they tell her that she is unrecognizable & that she needs to be alone. Val is still faithful to Jamie as she believes he loves her. The day she finds she is expecting, she finds Jamie does drugs & hires prostitutes for threesomes. He refuses to accept the baby as his & claims that he has been sterile for years.Val decides to leave Jamie, has left her job & is in deep debt. Jamie threatens to kill her if she leaves. Val gets an abortion & moves out of Jamie's apartment despite his threats.She goes back to her apartment & almost gets suicidal. She nearly loses her mind & life but recovers with the help of her erstwhile colleague from work, who is the only constant in her life. Val has gone without an orgasm for months & now her body is aroused. She gets a job at a high-end brothel. She now gets paid for doing what she loves, having sex. She meets many new lovers in her new job, along with Giovanni (Antonio Garrido) who pleasures her like no man has done before. She starts having feelings for Giovanni. But another client, Pedro, gets obsessed with Val & wants to marry her. When she resists, he pays extra to get Valerie out of the brothel in a hotel suite. There he abuses her physically & even has sex with her in the rear.Valerie wants to be alone, but her madame tells her that the next client is Giovanni & she agrees. Giovanni has a friend & has ordered another girl. But this time, Giovanni goes with the other girl, & sends Val with his friend. She realizes that as a prostitute she is someone else's property & has no life of her own.She gives up her job at the brothel & decides to be a free woman, the way she started out. She thanks her erstwhile colleague for her advice & wishes her luck in her own quest to find love.