This is a sequel to two previous stories involving Doctor Doom and Camelot. The book opens with Doom calling Iron Man to Latveria on the pretext of needing his help, but only to sell him out to Mephisto as part of a plot to obtain something Morgan Le Fay.
The story is not bad, but it seethes it's unnecessaryness and disposableness. As a one-off, it doesn't effect future continuity and it doesn't tell some profound or can't miss story. It has some good scenes, some okay characterization, and art that's a bit better than the story deserves. Overall, it was fine, but nothing to write home about.