The Avengers have always been Marvel's premiere super hero team, made up of all of the heavy hitters that the House of Ideas has to offer. But what happens when a team of this stature is squarely defeated -- and on their home turf to boot? Avengers: Under Siege collects the classic storyline in which the Avengers are finally bested by their villainous archenemies, the Masters of Evil. Even worse, their base of operations -- the Avengers Mansion -- is intentionally destroyed in the process. Can even the Earth's Mightiest Heroes rebound from this debilitating defeat?