The story is about Hancock, a "bum" who craves for alcohol morning, noon and night, and does not care much about life in general because he's an immortal and has been in the planet for the longest time (although he can only recall the last 80 years). But when crime is afoot, off he flies to save to the day. Problem is, his intoxicated body causes so much destruction than a "regular" crime solving method would have done that the millions of dollars lost stood out more glaringly than the "heroic" act that the people of Los Angeles pretty much doesn't want him around.
Life makes a turn for Hancock as a PR agent whose life he saves decides that he can turn things around for Hancock by being his PR agent and coaching him on the do's and dont's of public relations. Problem is, Hancock has become attracted to the PR agent's wife, and things take a turn for the worse...
My thoughts about this movie
The first half hour of the movie successfully introduces Hancock as a "professional bum" who doesn't really care about anything at all but since he has these superpowers and he has a teeny weeny bit of a conscience as he tries to understand why he was that way, he helps out resolve crime in his... well, unique way. He does it whether they like it or not.
SPOILER MODE ON
However, the movie's strong plot somehow decelerates when the concept of immortality is revealed. I know this is supposed to be fiction and anything can happen in fiction, right? but still... immortals meeting and speedily losing their powers and eternal life because of this contact? I don't buy it. So there were a lot of immortals in the distant past but they all started to die off because they are eternally attracted to each other... if this is so, where did they come from in the first place? Sketchy, that part of the plot is.
Also in superhero stories, there is a supervillain that is just as memorable, if not even more popular than the superhero itself. Superman has Lex Luthor, Batman has the Joker (among others), Hancock has... see? I forgot the name. It was just some regular bank robber who wanted revenge.
SPOILER MODE OFF
Given this rather blurry concept of Hancock's origins and concepts about their race, I enjoyed the first hour, but left me thinking it could have been better by the second hour.