Harry Ponders Malfoy's Suspicious Behavior in Knockturn Alley

Harry spends the last week of the summer holidays obsessing over Malfoy's odd behavior in Knockturn Alley. He recalls how Malfoy had shown something to Borgin that frightened him and is convinced that Malfoy is a Death Eater. However, Ron Weasley and Hermione Granger don't seem to share Harry's concern and suggest more innocent explanations.