Continuity mistake: At Ben's place, Frank enjoys a cold glass of Pabst Blue Ribbon - its colour, the level in the glass, and the amount of head change repeatedly within a few seconds.
Returning home to visit his father who is in intensive care at the hospital, Jeffrey Beaumont (Kyle MacLachlan) stumbles upon a human ear he finds in a field. With local police detective Williams and the local police department unable to investigate, Jeffrey and Sandy (Laura Dern), Detective Williams's daughter decide to do their own investigation. But what Jeffrey and Sandy's investigation leads them to discover that a dark underworld exists in their hometown. Jeffrey becomes suspicious of nightclub singer Dorothy Vallens (Isabella Rossellini), who is involved with Frank Booth (Dennis Hopper), a violent and evil man.
Sandy: I don't know if you're a detective or a pervert.
Jeffrey: Well, that's for me to know and you to find out.