A world stained black. Due to creatures, humanity is driven into a giant city where light and color converge. Humanity continues its pioneering efforts to reclaim the world, and Kay, a boy who wishes to become a member of the pioneering corps. However, he is ostracized for being “colorless” (무색인종)—someone without color. Then one day, due to an unfortunate incident, Kay gains the color black… 컬러리스트