In a world where over a hundred Gods walk amongst the people and each rules over a city filled with entrances to the Dungeon, Viskor Heema has served as a Grenium, one of the personal guards of the God Tres. Despite their immense power, Gods can still be killed by other Gods, but a rumor of an outlaw Adventurer discovering the secret of immortality has caught the attention of Tres and he's sending his favorite guard under cover. Viskor isn't the only one looking for it and he has to race against other guards, Adventurers, and even the Gods themselves as the entire world wants the answer to the question. Is immortality real?