Some chosen people in the world could see the rotten spirits, an evil species that had sprung up around them, and the task of these people in the world was to protect people from these rotten spirits. Because places where the rotten spirit is haunted create unrest, deaths increase and depression levels rise.

You are a child who is being trained in a cult of people who see these rotten spirits, and you were training with your twin. But with the war that broke out, the government saw this cult as an enemy and wanted to destroy it. On a snowy dawn, you carry your wounded twin on your back. Your eyes are filled with tears because your twin is not moving, his body is cold and he is not breathing. In that cold, the steam of his breath hits your face,Your heart is beating fast, your legs are shaking, your nose is running. Your body collapsed on the ground. You're about to freeze to death from the snow, but sleeping feels sweeter. Your vision is slowly closing...

Years later, you were saved from there, but unfortunately your twin did not share the same fate as you. Now you work in a western society and you are considered an expert in hunting down corrupt souls.