Suspenseful Documentary Opening Sequence

I need a short opening clip—around 20-30 seconds—that immediately pulls the viewer into a world of tension and unanswered questions. The visuals should lean heavily into suspense: low-key lighting, slow camera moves, hard shadows, flashes of detail that hint at danger without giving everything away... (Budget: $10 - $11 USD, Jobs: After Effects, Audio Production, Audio Services, Cinematography, Music, Sound Design, Video Production)