In a world where people don't age, the government finds itself facing a population crisis. It is then created a government program to control overpopulation. The program involves the killing of people who turn 30. However, a man questions himself about this political doctrine during his last birthday.

A woman journalist, Zoe, knows better than to go into a story with her mind already made up. But that's exactly what she does when she heads off to Spain to write about its men and their macho take (as she sees it) on relationships. As she tries to prove her thesis, she soon realizes that she doesn't know as much about the male sex as she thought. She also finds herself involved in relationships with the wrong men.