The continent of Iseland is shrouded in the shadow of the Grimoire of Eternal Night. On the surface are settlements of various ethnic groups, while underground are people who are living an ignoble existence. Now that the grimoire has corrupted the ley lines, a disaster lurks in the world. The vampire Laika, using her underground tavern as a base, rescued Calvin, an elite of the human knights who was framed during an undead raid. The two gradually developed unusual emotions in the process of relying on each other. How will they solve this?
The two went deep into the dungeon and met Thorin, the dwarf engineer, and Ivellan, the elf who could control the soul-eating vines, and a team was assembled. As the exploration progresses, Laika is approached by the black-robed wizards and the undead army. What secrets are hidden behind the black-robed wizards and the church? This crisis across the ground and underground is pushing them into an unknown abyss.
