Carmen is a 25 years old woman, she weighs 102 kilos and 300 grams and is non-orgasmic. She is in love with Alvaro her neighbor, a mediocre rock band singer, who has a very thin model girlfriend. Carmen lives with her brother Marcelo, 55 kilos, chosen "Miss Transvestite" several times, he works hard to save enough money to one day have a sex change surgery. Both live in the house of their grandmother Carmen, 50 kilos, narcoleptic. Proud of being "Miss teenager" in her youth. She denies that Marcelo is a man, and hates Carmen's weight, so she pays expensive and ineffective slimming treatments, Gradma Carmen is also non-orgasmic. Carmen will try to please her grandmother and lose some weight, help her brother to raise money, and most important, Carmen will try to fight the family curse and finally get her first orgasm.