Which people are associated in Tossing the Caper?

"Tossing the Caper" is a short story by the author Patricia Highsmith. It primarily revolves around the characters of a couple, the narrator, and their interactions with a mysterious stranger. The narrative explores themes of deception and psychological tension, highlighting the complex dynamics between the characters involved. Highsmith's work often delves into the darker aspects of human relationships, making the interactions between these individuals compelling and thought-provoking.