A Superhuman Registration Act has been passed which requires all people possessing paranormal abilities to register with the government, divulging true identities to the authorities and submitting to training and sanctioning in the manner of federal agents.  Those who do not register are considered criminals.  Some heroes, such as Iron Man, see this as a natural evolution of the role of superhumans in society and a reasonable request.  Others view the act as an assault on their civil liberties.  After being called upon to hunt down heroes in defiance of the Registration Act, Captain America goes underground and begins to form a resistance movement.

With the current Avengers team in disarray, Spider-Woman finds herself alone.  She is a double agent, working for both the terrorist group Hydra and S.H.I.E.L.D., the world’s peacekeeping taskforce.  Now, with the superhuman landscape shifting beneath her feet, Jessica Drew must decide on which side she falls.

From: New Avengers #23 (2006)