Is a plain fun movie all the way thru, billionaire Tony Stark (Robert Downey Jr.) assumes the identity of the high-tech armored Iron-Man to track down who is selling his own weapons to terrorists.
Frankly the plot is entirely incidental, it is akin to more coherent and worthwhile version of Ang Lee's "Incredible Hulk" storyline. Mostly it works by not falling into the pitfalls blazed by "Daredevil, The Fantastic Four, the aforementioned Hulk etc etc.
Where Iron-Man rocks most excellently is in the solid casting, Downey, Gwyneth Paltrow and Jeff Bridges play it absolutely straight up the middle, no mugging, no vaudville turns and no pretentious rubbish either.
This is important in a film about a crimefighting billionaire who uses an electromagnet to treat his cardial shrapnel wounds and features Gwyneth Paltrow outrunning a fusion explosion in strappy high heels.
Nope, Marvel has a winner here, my only question is this; How can Tony Stark operate sorts of computers and high tech design gizmos without everything wigging out from the powerful electromagnet implanted in his chest?