Ha-yoon leaned back, watching the progress bars of the GPS trackers flicker across her screen. Sometimes, to catch a ghost, you have to look exactly where everyone else is looking—but with much colder eyes.

The hum of the server room was the only thing louder than the rain battering the rooftop. Ha-yoon sat in the dark, her face illuminated by the harsh blue glow of three monitors. On the screen, a grainy video file buffered: Cold Eyes 2013 BRRip 480p x264 AAC - V...

The movie started. The subtitles appeared in white, crisp text. But Ha-yoon wasn't reading the dialogue. She opened the subtitle file in a hex editor, stripping away the timecodes. Beneath the script for the South Korean thriller lay a second layer of data—steganography at its finest. Bridge. 02:00. North Pillar. "Got you," she whispered.

She wasn’t looking for the movie. She was looking for what was hidden inside it.

Should I continue the story with the at the bridge, or

As the "Cold Eyes" of the movie tracked their fictional targets on screen, Ha-yoon tracked the real ones. She synced the coordinates to the tactical team’s headsets. "Target confirmed," the radio crackled. "Moving in."