Masahiko undid the top two buttons of his tunic and withdrew a six-inch square of something black and rigid, no thicker than a pane of glass. He brushed it purposefully with the fingers of his right hand, beaded lines of colored light appearing at his touch. Though these were fainter here, washed out by the train's directionless fluorescents, Chia recognized the square as the control-face of the computer she'd seen in his room.