The Dream Chasers arrive at Castle Nocturnia hoping to find the key to defeating the Nightmare King, but the castle won't reveal its secrets easily.

The Dream Chasers rush to crack the code to reveal Lunia's secrets; the Nightmare King presses a full-scale assault on Castle Nocturnia.

The Nightmare King begins to open a rift to the Waking World; Mateo presses Oz for the truth about Lunia's battle with the Nightmare King.