When Montse goes to Barcelona for a summer English course, she brings a head full of false ideas and a heart full of dreams and love of life. Staying at his sister's, a hostess, free and unbiased, only serves to increase her confusion. Along with her ​​classmates, Nuria and Marimar, Montse is willing to lose her virginity and find guys to start on sex.

One day, without knowing how or why, the birds of a big city leave, disappear. It is believed to be a protest against environmental pollution. Some children (the Regaliz group), then embark on an ecological campaign to get the birds to return to the city.