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A young woman stands alone on a rainy Seoul street at night, holding her smartphone as neon signs reflect across the wet pavement. She notices a missed call from an unknown number, then answers when the phone rings again, slowly becoming uneasy as silence fills the call. She turns and sees a young man under a black umbrella staring at her with a quiet smile, but a passing car briefly blocks her view, and when it clears, he has mysteriously disappeared. Her phone lights up with a new message: “Don’t look back.” The scene ends on her frightened expression, with realistic Korean actors, cinematic rain, moody blue and warm lighting, shallow depth of field, subtle film grain, natural acting, suspenseful pacing, and premium Korean thriller cinematography.