Ben (Dustin Hoffman), who just graduated from college, is very confused about his future. He happens to meet the romantic Mrs. Robinson (Anne Bancroft) at this time. Although she is no longer young, Mrs. Robinson seduces Ben again and again, and the two have a relationship. During their date, Ben met his wife's daughter Elaine (Katharine Ross), and was deeply attracted by her innocent youth. Ben confessed his love and started a normal relationship with Elaine, but was strongly opposed by Mrs. Robinson. Her mother's anger made Elaine aware of some inside stories. Elaine was very sad and hastily agreed to another person's proposal. Ben rushed to the church where Elaine got married. He wanted to turn the tide...