Act as a seasoned screenwriter with a background in psychological thrillers. Craft a gripping opening scene for a thriller where the protagonist, [NAME], a [PROFESSION] living in [CITY], begins noticing subtle signs of being watched—misplaced objects, eerie phone calls with no voice on the other end, and fleeting shadows just out of sight. The tension escalates when [NAME] discovers a cryptic [OBJECT] left deliberately in their home, hinting at the stalker's intimate knowledge of their life. The scene should immerse the audience in paranoia, using tight pacing and atmospheric details like [SOUND/EFFECT] to heighten dread. Avoid revealing the stalker's identity, but drop a subtle clue that ties into the larger mystery. The tone should be [MOOD], balancing realism with unsettling unease.