Newland Archer and May Welland are the perfect couple. He is a wealthy young lawyer and she is a lovely and sweet-natured girl. All seems set for success until the arrival of May's unconventional cousin Ellen Olenska, who returns from Europe without her husband and proceeds to shake up polite New York society. To Newland, she is a breath of fresh air and a free spirit, but the bond that develops between them throws his values into confusion and threatens his relationship with May.