Woohyun, Sungyeol, and Myungsoo went to a Doll Castle to made handmade doll for their school task. After they arrived, they were welcomed by a young pretty girl named Yoona. At first everything seemed normal till Woohyun saw a mysterious guy who stared at them with his flat stare. Not only that, another odd situation happened when Kim Sunggyu, the son of the Doll Castle's owner started the conversation with his odd accent.