Please answer the following question: Please answer the following question about this movie plot. If it's un-answerable, please output "No answer". Question: What secret lies behind Devlin's wall? Movie plot title: Fred 2: Night of the Living Fred Movie plot: Fred arrives home screaming and shares his flashback with the audience. The day before Fred went to music class to play Fur Elise and his favorite music teacher Mrs. Felson, who has trouble hearing, told him that he plays beautifully. The next day he comes in to play, expecting Mrs. Felson, but finds out that she has been replaced by Mr. Devlin. He then sees Mr. Devlin cleaning up and throwing away a hearing aide, which makes Fred wary. Later he is walking home with his best friend, Bertha, and sees a girl named Talia following them. Believing that he is being stalked, he runs home and arrives screaming.The next day at school Devlin supports everyone to join a community called Join the World of Music. Fred thinks that Devlin is trying to turn everyone into vampires by having them take his lessons, and to his horror everyone takes the lessons. That night Fred spies on him and sees him burying something, which he suspects is a body. After Fred finishes talking to Talia, she vanishes, causing him to think she is a ghost; he imagines her ghost in his house and falls down the stairs reaching for her. The door is knocked on and he opens it to see Kevin's mom and she invites them to a party; then it is revealed that Talia is Kevin's sister. The next day, the doorbell rings and Fred opens it to see Mr. Devlin, who is taking his mom on a date; this makes him become immediately uneasy.Fred enlists the help of Bertha to lend a helping hand in getting enough proof that Mr. Devlin is a vampire. Fred and Bertha spy on Mr. Devlin and Fred's mom's date, with Bertha posing as a waitress (when Mr. Devlin remarks that she looks just like one of his students, she covers it up by claiming to be her mother). Mr. Devlin orders a bloody steak making Bertha more suspicious. He then spies on Mr. Devlin sees his old music teacher's jacket; he then becomes even more suspicious of Devlin. Later that night, he falls from his window because he notices Mr. Devlin see him as he is trying to get away. Then, his "dad" pulls him up and brings...
A:
Butcher's Room.