The hunt for the Sandman, the only one who can repair Lunia's hourglass, brings the kids to the dangerous Murky Realm.

Determined to give the Insomniacs a night of good dreams, Izzie and friends bring them to the Candy Realm. However, no place is safe from the Nightmare King.

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.