Placed on the back of the neck, iMood chip can easily control one's emotions with a light touch. 20 short years after the invention of iMood, the society seems to be in peace, but the crisis of the collapse of human emotions looms beneath. Yu Qing Le is a police officer who also has an iMood addiction. One day, a dead girl is found nailed to the ceiling which is just a start for a serial killer.