DEAREST details the events that occurred during the war over the magical weapon, the Lightning Scepter, between the demons of the Dark Force and the ancient and aristocratic family of occultists, von Einsiedel. The war repeats itself each time a new heiress to the power is born. However, a little over 25 years ago, the Lightning Scepter disappeared, splitting into two: the Protector's Scepter and the Opal of Power. Although the von Einsiedels managed to retrieve the scepter, the opal remains missing.
After the damage left by the last war in the von Einsiedel family, Odette, the current heiress, fears giving her life to such a devastating war, which creates a dilemma for Odette's existence. On the other hand, the von Einsiedels have taken in Luciana, a warrior who has sworn to follow only her master's orders. Who, in their right mind, would volunteer to fight in a deathly war? Despite Luciana's self-destructive attitude, Odette finds a source of strength in her. Likewise, both women discover that there is much to explore together throughout the war.
Now Odette and Luciana stand at the center of a great war, face to face with demons of different classes, under the tension caused by enormous family ambitions. By trusting in one another, the two women encounter elusive opponents on the battlefield, beings fueled by unique desires and ideals.