Cha Hyun-Soo is a senior high school trainee. He is additionally a recluse and rarely leaves his area. He refuses to talk with his dad, mom and also younger sis. Eventually, his whole family members, except for him, dies in a cars and truck crash. Cha Hyun-Soo is left all alone. He moves into a small apartment. Right now, a mysterious sensation of people developing into monster take place all around the world. The residents of Cha Hyun-Soo's apartment building, including Pyeon Sang-Wook, battle versus these beasts as well as attempt to make it through.