Nick learns that his married cousin Daisy and his neighbor Gatsby were once in love, and he agrees to help Gatsby meet with Daisy. Gatsby and Daisy begin an affair. After Tom confronts Daisy and Gatsby, Daisy accidentally kills Tom’s mistress with Gatsby’s car. Gatsby takes the blame for the accident. Tom identifies Gatsby to his mistress’s husband, who proceeds to hunt Gatsby down and kill him for revenge.