Originally posted by Wikipedia

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As the story progresses, it is revealed that some infected people have discovered a means to hold the disease at bay. However, the "still living" people appear no different from the true vampire during the day while both are immobilized in sleep. Thus, along with the vampires, Neville kills the still living people. He becomes a source of terror to the still living, since he can go around in daylight (which they can only do for a short length of time) and kill them while they sleep.
The still living send a girl named Ruth to spy on Neville, and they cleverly replicate Neville's relationship to the dog. Ruth pretends to be terrified of Neville at first sight, and rather than spend weeks trying to win her over, he attacks her and drags her back to his house. Though Neville is suspicious of her true nature and much of their interaction focuses on Neville's internal struggle between his deep seated paranoia and his hope, it is clear by his seizure of Ruth that the scales have tipped in favor of the irrational. Eventually Neville performs a blood test on her, revealing her true nature to him before she knocks him out. Ruth leaves a note telling him about the group of people like her, explaining that she was sent to spy and how monstrous he appears to them. Months later, the still living people attack, shooting Neville but taking him alive so that he can be executed in front of everyone in the new society.
Before he can be executed, Ruth provides him with an envelope of pills. Neville takes the pills so he will feel no pain when the still living execute him. He finally realizes why the new society of the living infected regards him as a monster. Just as vampires were regarded as legendary monsters that preyed on the vulnerable humans in their beds, Neville has become a mythical figure that kills both vampires and the infected living while they are sleeping. He becomes a legend as the vampires once were, hence the title.

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Originally posted by Shuyin

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The movie doesn't use a soundtrack, which in my opinion, makes it more effective.

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Originally posted by FX

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Originally posted by Shuyin

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The movie doesn't use a soundtrack, which in my opinion, makes it more effective.

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Quick note: the movie does use a soundtrack, what it doesn't use is a score. The score is the orchestral or otherwise music that is composed for the film and the soundtrack is music that is featured in the film by certain artists.

But I understand. All music used in the movie was diegetic, or part of the world we are perceiving, where as a score (and soundtracks most/all/some of the time) are non-diegetic, or outside of the world, only perceived by the viewer.

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