The Seventh Republic, a country hated by the sun.
The country, which lost its sunlight in the past wars, is dominated by vicious criminals and invisible shadows. The National Police Agency protects citizens from such evils and is the basis of justice.
The main character, Japanese Trend Luka, belongs to the 13th Division (commonly known as Hakosumi), where troublesome people and problem children gather among the police.
In the days when there were no major incidents, Luka secretly investigated the "cult incident" that had occurred in the past. Meanwhile, a new member joins the 13th Division, and a turning point comes.
Rumors are heard in the police of the "Alliance of Shine", whose existence itself is a mystery...