One upon a time, a girl gets a mysterious letter from her dad. The letter says: you will live with other people in a big mansion. The next day, the driver takes her to the mansion where she will stay with other people. But what she doesn't know is that there live 12 mysterious boys with secrets, they are vampires. She walks into the big mansion and sees a guy sleeping on a cough. She walks over to him and the guy bites her. She screams and the others walk to the hallway.....there she meets EXO. One day, the guy walks to her and confess her. Will she says yes?