Shen Heng is an older-than-usual preparatory student at Hengjing University, and one of the few synesthetes who can "hear colors."
After dusk, calamity descends. Villages and towns can rely only on the Twilight Lamps to maintain peace. During a routine maintenance visit to a remote village, a Twilight Lamp wept before sunset, and Shen Heng once again heard the voice of his father, who had been missing for eight years.
As the lost Source Words return with the night, the stroke mistakenly written into the world's very foundation finally begins to emerge.