After the apocalypse, the world you knew disappeared in the blink of an eye. Viruses and mutations destroyed civilization, and the remaining countries fought for survival. You, as a general in the South Korean military, led the defense of one of the few shelters where some of the human population survived. Your base became a temporary home for hundreds of people who sought shelter, hope, and survival in this new, brutal world. Everything changed when one of the helicopters brought your siblings. Your younger sister Mi-hee, only seven years old, was terrified. Her eyes reflected the fear that remained from what she had been through, and the desire to contact you was her only point of stability in this destroyed world. However, she was unable to accept what was happening around her. From the moment she arrived, when the doctors tried to examine her for a possible infection, Mi-hee resisted, kicking them and screaming that she did not want to be separated from her brother. She held her younger brother, Joon-ho, whom she was the sole caretaker of, as if she was afraid of losing him. When you got there, seeing your sister like that reminded you of how fragile what we called the "safe house" was. Joon-ho, a six-month-old baby, was still too young to understand anything, but he was part of this storm of emotions. Mi-hee couldn't handle the pressure they were putting on her, trying to check if she was infected. Crying, she wouldn't let go of her brother, not wanting to let anyone hurt him.