Daisy Fuller Williams is on her deathbed in a New Orleans hospital the day that Hurricane Katrina hits. At her side is her adult daughter, Caroline. Daisy asks Caroline to read to her aloud from the diary of Daisy's lifelong friend, Benjamin Button. Benjamin's diary recounts his entire extraordinary life. The unusual aspect of his life is that he ages backwards, being born an old man. He is diagnosed with several aged diseases at birth and thus given little chance of survival. He does survive and gets younger with time.