Mary and Mike are a couple of elite agents from the Chilean secret police, DINA. Their job is to eliminate opposition leaders who from abroad articulate resistance to the fierce military dictatorship of Augusto Pinochet. In her public life, Mary is a writer and she relates with the most outstanding members of Santiago's cultural life. Mike, is a talented "gringo" for electronics. They live with their children Cony and Simon in the suburbs of Santiago where they tend to give crowded parties. But as they celebrate, in the backyard of their home they torture, murder and experiment with weapons of mass destruction.