The frigid light of the fluorescent lamps projected grayish hues across Terminal D at Otopeni Airport. Officer Andre examined the throng with alertness that came from years of expertise. Luna, an imposing German Shepherd with a shining coat and intelligent eyes, walked alongside him. For three years, they had been an unbreakable unit. Luna has made no mistakes in all of her life.

Andrei’s gaze shifted from face to face, observing gestures, motions, and reactions. He knew the game by heart.Luna stopped abruptly. Her ears perked up, tail stiffened, and her gaze locked onto a woman pushing a stroller with a baby wrapped in a light blue blanket. The dog’s nostrils flared, sniffing the air with an unusual intensity. Then, without warning, a low and threatening growl rumbled from her throat.

Andrei detected the movement right away. The air appeared to thicken around them, and the terminal cacophony vanished like a dream. The woman, a slender brunette with bulging eyes and a pale face, grasped the pram handle desperately and stammered: