Sara is a high-class girl overprotected by her hysteric mother. During a weekend, she goes to a pub called El Calentito wants meeting with Toni to lose her virginity, but Sara discovers Toni with other girl, and she drunks until being unconscious. At the next day, Sara wake up in the house of Leo and Carmen, two free-spirited low-class girls who are looking for a girl for her music punk band, Las Sioux, after that other girl, Chus, left the band. Since then Leo and Carmen have that same morning an interview with Ernesto, a music producer, they ask Sara helps them going with the two to the interview. Reluctant at the beginning, Sara finally accepts. When Sara meets Ernesto, she starts falling in love with him, thinking if he would the perfect man to lose his virginity.