They find themselves in the Valley of Sound, when the travelers escape the doctor and horrible noise and then the sound completely silent. They meet Soundkeeper who has withheld all the sound of the Valley. People have stopped appreciating because they haven’t pass the mission. At the first tried, Milo fail a mission to appreciating the sound. Later on, Milo steals a sound from the Soundkeeper’s place, which the people of the valley use to break open the sound vault.
Milo and his friends continue on their way to Dictionopolis after helping in the Valley of Sound. They meet the Dodecahedron, a man who have twelve faces, each of have expresses a different emotion. The Dodecahedron takes the travelers to see the Mathemagician. Milo succeeds to trick the Mathemagician into agreeing to releases the princesses. Then, he find out that he might climb through the Mountains of Ignorance to reach the Castle in the