Catherine: Because we haven't cleared Sam as a suspect. Greg: It's a match to the gun that was used to kill a guard in the Pan Am heist. Look ... here, man. Sam Braun is greeted at the entrance.) Voice: (o.s.) Warrick: Yeah, but who killed him?
Plan: A: The CSIs; Q: Who questions the city's crème de la la at a party? A: a young man; Q: Who was killed at a party? A: Catherine's father; Q: Who is Sam Braun? A: a suspect; Q: What is Sam Braun's role in the investigation? A: personal conflict; Q: What grows between Catherine and Sam Braun? Summary: The CSIs question the city's crème de la crème at a party to discover who killed a young man. As Catherine's father Sam Braun is once again a suspect, personal conflict grows between the two.