25岁的女高中生Heaven Condominium might seem like a great place to live, but it soon becomes the site of a horrible tragedy. After someone living in the complex contracts a strange disease that causes a violent, zombie-like affliction, authorities lock it down to prevent the spread—with its inhabitants still inside. To try and stop the epidemic, police officers Run and Prat move in, but they soon find that their mission is more difficult than it seems. As the infection continues to spread, the condo residents grow aggressive toward each other, prioritizing their own survival above all else. Can Run and Prat find a way to deescalate the situation before it's too late?