Jeremy in the Underworld

Jeremy read the words on the ancient scroll out loud, "In the land of Hades by night and day, six blood-red lanterns light my way. Who am I?" He frowned. It was a hard riddle. "Hades is the god of the Underworld," said Mr. Magnus helpfully. Jeremy is willing to help Mr. Magnus solve the riddle and save his theater, but is he willing to travel into the land of the dead to do so?