Use the attached 16-panel Element as a storyboard reference only: interpret its individual shots as full-screen moving cinema, never display its grid, gutters or contact sheet. Produce one coherent 10-second, 16:9 cinematic hero video for an AI movie poster generator: a creator turns an original mystery story into finished movie-poster key art. Start exactly from the First frame and finish exactly at the Last frame. Preserve the same adult female lead, face, chestnut hair, burgundy trench coat, black turtleneck and black smartphone throughout. Photorealistic premium thriller cinematography, cool teal shadows, warm amber practical lights, subtle 35mm grain, realistic hands, restrained natural acting. 0.0-1.8s: gently push toward the filmmaker at her desk. She looks from the story page to her glowing phone, alert with discovery. Brief close-up of the pen and script, then her eyes catching amber light. 1.8-4.0s: match cut from the phone to the same phone on a rain-soaked railway platform. Wide moving shot reveals the woman beneath station lights; cut to a low tracking shot of her coat and a rippling puddle reflection. 4.0-6.5s: cinematic close-up as she turns toward a distant adult male silhouette. Cut to train headlights in mist, then an over-shoulder view with phone foreground and stranger far away. No violence. Varied close-up, wide, low-angle and reflection shots; clean deliberate edits, no frantic strobing. 6.5-8.0s: a smooth camera pullback aligns her portrait, glowing phone, rain, rails and distant silhouette into layered original poster key art. The film title resolves cleanly on the dark left half. 8.0-10.0s: arrive at the exact Last frame: sharp white title THE LAST MESSAGE and small tagline EVERY SECRET LEAVES A TRACE, woman on right. Hold this readable final poster steadily for two seconds; subtle rain and ambient light may move while typography stays fixed. No additional words, logos, interface, watermarks, duplicate people, face morphing or grid overlays. Cinematic rain, distant train and a restrained suspenseful instrumental swell; no speech or sung words.