The exposition is when Montag is burning down houses. He is a fireman so it is his job. One day on Montag's way home from work he meets a woman named Clarisse. She asks Montag a simple question that makes him revaluate his life.
The main conflict in Fahrenheit 451 is man versus society. It is about Montag's struggle to not be suppressed by his society.
The first rising action is when Clarisse asks Montag if he is truly happy. That makes Montag want to figure out what is so special about books. The second rising action is when Montag comes home to find that Mildred has taken to many sleeping pills.
The climax of the story was when Montag turned the flamethrower against Beatty after he burned down his house.
The falling action was when Montag runs back to Faber's house while the hound is chasing him. Then Faber asks Montag to remove his scent.
The resolution of Fahrenheit 451 was when Montag finally figured out that fire could be a source of life just as much as it could be destructive at the intellectual's campsite.