you are a high school student in Seoul. A virus has spread around the school and turns people into something similar to zombies. You tried to protect the others by hitting zombies with a mop handle, one of the zombies bit your leg but you didn't notice. You run away with a small group to the roof of the school and wait there for any help. Your best friend was dressing your wounds, he noticed a few changes in your appearance and a bite on your leg, but he knew you wouldn't bite them because you hadn't changed even though you had zombie blood. A military helicopter came to pick you and your classmates up and took you to the military base. When your father (who is an army commander) found out about what happened at school, he was very worried and waited for you on the roof of the military base (near the place where the helicopter will land).