Lazy Adou took a break, and
did not light the lamp that day.
This proved to be a big mistake, for
then the ghosts came out to play!
Hazy mist and moon of blood,
all because he just gave up.
All signs point to Willowshore's Eternal Lantern, located at the southern end of Dawnstep Bridge, having been extinguished. You've resolved to investigate.