In short: Scott Pilgrim (Cera) is the 23-year old bassist for the Toronto garage band Sex Bob-Omb. He shares a dump of an apartment and a bed (platonically) with his gay roommate and whomever the roommate brings home. Dumped by the lead singer of The Clash at Demonhead, his new girlfriend is 17-year old Knives Chau (Ellen Wong), who bonds with Scott while playing the Ninja Ninja Revolution videogame at the mall. As his bandmates aspire to earn a gig at the Chaos Theater by winning a battle-of-the-bands series, Scott falls abruptly in love with Amazon deliveryperson Ramona Flowers (Mary Elizabeth Winstead), a woman he first saw in a dream. He places an order on the desperate yet accurate assumption that Ramona will deliver it, and pursues her while neglecting initially to break up with Knives. As both girls attend the first battle of bands, Sex Bob-Omb's set is interrupted by a man crashing through the wall and flying onto the stage to challenge Scott. This flying man, David Patel, had earlier e-mailed Scott notifying him of his new obligation to fight Ramona's evil exes to the death, but Scott had deleted it because it was boring. No matter: David is here and now Scott must fight.
I'd heard of O'Malley's comics but hadn't read them before watching Wright's movie. So at the moment of confrontation, I figure: Okay. Either Knives or possibly Ramona will have to teach the dweeb to fight, so that after a standard sequence of bungled training he will at last transcend his inadequacies and assert his rights as a man. In the next instant I stood corrected. Scott Pilgrim knows perfectly well how to fight. He has superhuman strength, speed and leaping ability, as do his antagonists. He is both a dweeb and a superhero. This is possible because he exists in a video game universe where he can accumulate points with every well-struck blow toward earning an extra life (he'll need it), where Knives and Ramona in fact do have super fighting abilities (and Ramona carries a giant retractable sledgehammer in her handbag) and where defeated enemies explode into clouds of coins.
For all I know, anyone in the movie could fight like the main characters do, but most of them don't need to. That's because the fights are metaphors the way Astaire and Rogers's dances are metaphors, the latter for courtship if not consummation, the former for the modern struggles of lovers with one another's baggage of past but perpetually present exes. It may sound blasphemous to compare the work of Michael Cera's stuntman with the lyric agility of Fred Astaire, but the fight scenes and the dance scenes serve the same basic narrative purpose.
We can go further invoking the past. Scott Pilgrim isn't anything so much something new, apart perhaps as a matter of sensibility as it is a culmination of a century of genre evolution or a closing of an evolutionary loop. I've written in the past that the modern action film is an outgrowth of silent comedy, with the stunt-oriented work of Buster Keaton as the seminal influence (as recognized most explicitly by Jackie Chan) and The General as the first true action movie. Silent comedy itself derives from the burlesque tradition of vaudeville which exploits its inherent stage-bound unreality by making comedy out of exaggerated violence and the comic's ability to recover from it in mock-miraculous fashion. Early comic strips like Mutt & Jeff enhanced vaudevillian violence by liberating it from human limits, while movies emulated comic strips once liberated in turn by editing and special effects. With Scott Pilgrim, Edgar Wright takes everything that film has developed in special effects, stunts and fight choreography and renders it back into virtual cartoon form.
The film's historic and aesthetic achievements vary. Scott Pilgrim is actually a mixed metaphor, since it sometimes emulates its original comics medium as well as video games. But it only looks cheesy when sound effects for doorbells and telephones are inscribed on screen. There's really nothing more to do with that gimmick than what Batman did more than forty years ago.
Meanwhile, there's an imbalance to the presentation of the Evil Exes when one is portrayed by a star (Chris Evans), another by a sort of name (Brandon Routh) and the rest (not counting Jason Schwartzman as the ultimate boss) by whomever. Nor is there the sense of progression through increasingly difficult antagonists that I'd expect from a video-game format movie. Scott even defeats a pair of twin-exes with a superior sound system rather than fighting skills, as if Wright had decided that that mere fighting had grown monotonous, while Evans destroys himself through a foolhardy skateboard stunt. From the nature of the entire project, the comedy is going to be hit or miss, but overall Wright proves that he contributed something to his Simon Pegg vehicles in the form of timing and pacing. As a big budget comics adaptation, Scott Pilgrim inevitably looks impersonal compared to Sean of the Dead, but Wright and his ensemble of actors infuse it with a conviction and vivacity that make Pilgrim arguably the best fantasy film of 2010.