Æon Flux is set in a bizarre, dystopian future world. The title character is a tall, leather-clad secret agent from the nation of Monica, skilled in assassination and acrobatics. Her mission is to infiltrate the strongholds of the neighboring country of Bregna, which is led by her sometimes-nemesis and sometimes-lover Trevor Goodchild. Monica represents a dynamic anarchist society, while Bregna embodies a police state.