John Hancock is an unhappy and reluctant superhero who is depressed and has drinks heavily. He has saved many lives in Los Angeles, but in doing so, he has no regard for the damage he causes. The public has had enough of Hancock. But one day, Hancock saves the life of Ray Embrey, a public relations executive who now can go home to his wife and child, thanks to Hancock. Ray owes Hancock his life, and he makes it his mission to change his superhero's...