A young girl has been locked away by her family, for fear of a disease without cause or cure. Her cousin refuses to abandon the sightless youth to her fate, worried that she will soon lose the light within as well. Drawn by the scandal of medical mystery like a moth to a flame, Ginko arrives as loyalty allows the contagion to spread. Too much time spent between the worlds, too little now left to save the girl. When fascination of the mushi invited them in across the threshold, the cure must be found in the curse.