In the city of Kageboshi, life is good. However, after one disappearance, there is another. Until a large stream of dissappearances has began to happen. What is even worse now, is that the day after every foggy night thereafter, the disappeared people of Kageboshi are found, brutally murdered and look to be without a soul, their eyes completely colorless.

To couple with this, a strange occurence has began to happen with the town. Everynight, at midnight, every person who is awake suddenly feels like something happened to them in a split second but cannot remember the details.

A few human beings are aware of what is going on. At this point time freezes for the normal people, who become trapped in coffins and become nearly oblivious to anything. The people who remain awake during this time are either blessed, or doomed. The people who are doomed, are the people who disappear and are found murdered days later. Kidnapped to a different realm by being called the Shadows. When the fog comes in the Human Realm, the fog clears in the realm of Nightmares and the shadows kill the kidnapped people.

There are people who are blessed, and can combat these shadows and even pass through to the Nightmare realm. These people have taken into their own duties to save these people who disappear and add to their ranks. But this now becomes a war. Will this end with peace, or genocide?