That something is the Infected, human plague survivors transformed by the virus into ashen predators who have effectively laid waste to the one percent of humanity genetically immune to infection. By night, they take to the streets, unleashing their primordial howls like bats desperate to return to Hell. By day, hindered by a vampiric reaction to sunlight, they roost in the shadows, temporarily ceding control of the city to the one remaining uninfected human, the scientist Robert Neville, who spends every waking hour searching for a cure. Those, roughly, are the events of Richard Matheson's 1954 novel I Am Legend, which has been adapted for the screen twice before — first as the Italian-made The Last Man on Earth (1964) with Vincent Price in the lead, and later as The Omega Man (1971), a piece of early-'70s psychedelia that cast Charlton Heston as Neville.
In Lawrence's version, which was adapted by screenwriter Mark Protosevich (Poseidon) and revised considerably by Oscar-winner Akiva Goldsman (A Beautiful Mind), Will Smith steps into Neville's shoes, and it's the first time an actor has been asked (or allowed) to play the character as something more than God's lonely, angry man. For much of the movie, it's literally a one-man show, as Neville goes through his daily routine, tearing about the empty Manhattan streets in his strategically product-placed Mustang Shelby, raiding abandoned apartments for nonperishable supplies, and trapping the occasional Infected so as to have a new trial subject for his laboratory.
Smith is simply dazzling here, and for all the undeniably impressive work the actor has done on his physique for this role, what's most appealing about him is his active intelligence — how he thinks his way through a role — and his capacity for human weakness. Watch him, especially, in the scene where he nurses his wounded canine companion, and later, when he refuses to abandon his "post" to follow fellow disease-free survivor Anna (City of God star Alice Braga) to a supposed survivors' colony in (where else?) Vermont. If he just stays put in his lab, he tells her, testing one treatment after another, he's sure he can put things right. There's a manic edge to Neville by that point, and Smith makes you feel every inch of his impotent rage. In what has been a pretty remarkable career up to now, it's this performance that fully affirms Smith as one of the great leading men of his generation.
If I Am Legend is less stylistically mind-blowing and intellectually ambitious than last year's Yuletide dystopia, Children of Men, it's not far off. The crux of the narrative is a timely dialectical argument between a man, Neville, who puts his faith in science, and a woman, Anna, who puts hers in God — each of whom appears, by turns, somewhat fanatical.
Lawrence's direction, too, is more subdued and artful than you expect to find in a high-ticket holiday blockbuster, notwithstanding a smattering of cheap shock edits and sound effects. More often, he takes things slow and easy, staging much of the film in long, dialogue-free handheld camera shots that use space, production design, and intricately layered sound effects to deliver us into Neville's desolate existence. But when the time comes for the inevitable showdowns between Neville and the Infected, Lawrence is no slouch, notably with an ingenious standoff in which a dwindling band of daylight is all that separates Neville and his pooch from almost certain doom. If I've saved mention of those scenes for last, it's only because Lawrence — like Peter Jackson and James Cameron — is among the few filmmakers with full access to the digital paintbox who seem to understand how those tools work best: to magnify the human dimension of a movie instead of extinguishing it.