Three couples are having sexual problems until a porn star shows up and teaches them a few lessons.

Al Pereira is hired by Lina, the wife of a wealthy man, to recover some compromising photos. She has sex with him by way of a retainer. In the course of his investigation, Al is obliged to commit a couple of murders... and he's left holding the bag when Lina turns out not to be what she seems to be.

Ana is running away from her hometown while Mar, an old acquaintance of hers, is coming back after a long absence. They find each other in the middle of the road and through the night, they make a journey amongst their fears to find out that still waters run deep.