Julio and Tenoch are typical over-sexed and under-occupied teenagers. During a festive afternoon with their families they meet Luisa, a twenty eight year old Spaniard, and flirt with her with all the style and grace seventeen year old boys are known for.
As a joke, they invite her to accompany them on a road trip to a beach called Boca Del Cielo, neglecting to mention that they wouldn't know where to find it, even if it did actually exist. To their astonishment, she accepts.