After dropping off Morgan and Miranda at the Gnarly Tree, Amelia begins to get angry about Clover going missing. Zahn suggests they check the Amy's secret ruins, since there was a door that opened up for the trolls at night.

Once they get there, there isn't any obvious way to get the door open. Amy suggests it has to do with light – that maybe when the horns of the Procession pass overhead, and the light from the tower is cut off, the door will open. There's no way to really test it, however, since they don't have anything that could block or deflect the intense beam of light.