Noah Calhoun falls in love with Allie Hamilton, a wealthy summer visitor. They have a passionate romance that summer, but Allie leaves to attend school. Noah writes her letters daily for a year, but Allie's mother keeps them from her, forcing Allie to move on. She gets engaged to another man but realizes she still loves Noah. They reunite and rekindle their romance, though Noah now has a life with another woman. The film depicts their enduring love through flashbacks and Noah caring for Alzheimer's-stricken Allie by retelling their story daily.