The continent of Aisilan is shrouded in the shadow of the Eternal Night Grimoire. The surface is home to settlements of many races, while those below ground struggle to survive. Now the grimoire is corrupting the earth’s ley lines, and disaster is looming over the world. Laika, a vampire who uses his underground tavern as a base, rescues Galvin, an elite human knight falsely accused of a crime, during an undead assault. As the two rely on each other to survive, unusual feelings begin to develop between them. What will they do about it?
The pair venture deep into the underground city, where they meet Torin, a dwarven engineer, and Ivelan, an elf who can control soul-devouring vines. Their party is now assembled. As their exploration continues, Laika finds himself steadily cornered by the Black-Robed Sorcerer Order and the undead army. What secrets lie behind the black-robed sorcerers and the Church? This crisis, spanning both the world above and below, is pushing them toward an unknown abyss.