A critically ill elderly woman opens her sleepy eyes as a hurricane hits New Orleans, USA. The old woman's name is Daisy (Cate Blanchett), and she asks her daughter Caroline (Julia Ormond) to read a diary for her. The author of this diary is Benjamin Barton (Brad Pitt). Benjamin was born during the Armistice of World War I, but he was born like an old man. He was regarded as a monster by his father and abandoned in a nursing home. Benjamin lives with the elderly in a nursing home. But no one expected that Benjamin developed inversely-the younger he lived! Perhaps it is some people's dream to "live younger and younger", but Benjamin, who really grew up in this way, has troubles and happiness that others cannot understand. Through half a century of world change, Benjamin is in it, feeling feelings that others cannot. Why did my mother let me read this diary? What is Benjamin Barton's relationship with his mother? Caroline fell into deep doubt and curiosity.