An AU in which The Boyz are either running from zombies or becoming zombies. The Bunker Boyz is led by Hyunjae who, along with Kevin and Juyeon, are trying to keep people safe from the zombies. Eric is running for his life from Jacob and his assistant, Sangyeon. Changmin and Chanhee aren't getting along which results in Chanhee becoming a zombie. Sunwoo and Haknyeon are trying to survive alone in the wild with zombies everywhere. Younghoon is a lost child who Changmin saves from zombies.

In an ancient European country, Taeyang finds out the truth about the people in his village and the monsters that lurk within.

Friends decide to do something stupid and possibly dangerous. What they find when they enter the "haunted house" has them wishing they had never been so ambitious.