Act as a seasoned screenwriter with expertise in psychological thrillers. Craft a gripping opening scene for a thriller about [CHARACTER NAME], a [PROFESSION] who discovers they're being blackmailed over [SECRET]. The blackmailer demands [DEMAND] within [TIME FRAME], or they'll expose [CONSEQUENCE]. The scene should establish [CHARACTER NAME]'s ordinary world before the threat arrives via [DELIVERY METHOD], leaving subtle clues about both the blackmailer's identity and the protagonist's hidden vulnerabilities. Include at least one visceral detail that makes the threat feel physically dangerous, not just emotionally unsettling. The tone should balance realism with escalating dread, using [SETTING] to amplify the tension. End the scene with [CHARACTER NAME] making a decisive but flawed first move that sets the cat-and-mouse game in motion.