Once upon a time, the magic of Eden penetrated the mortal world. However, its use is prohibited and is punishable by imprisonment in Vardin prison. After the death of his mother, Kaider pursued only one goal - to punish those who use extra-dimensional magic for their personal interests. According to the young man, they must be in Vardin prison. Therefore, as soon as Kaider gets the opportunity to become a public defender's apprentice, he agrees without hesitation. But one day, three criminals meet on his way who need protection, and Kaider’s usual black and white world begins to crumble. Their stories come together as Vardin finds himself at the very heart of the veil between the mortal world and another dimension from which Eden penetrates. And along the corridors of the dark labyrinth they lead a new prisoner... his own sister.