A battle against rogue angels severed Coura's connection to the demon Soirée, and she wakes to find herself unable to wield dark magic. Events continue to worsen when she learns of a traitor committing murders in the palace, though her companions' faith in her falters when she reveals her past. Through the recovery and return to the capital city, Coura prepares to move on until an opportunity arises to reunite with her lost power. If she accepts, she must travel across Asteom to rescue those in danger from misshapen creatures, yet the cost for such heroics is unknown.

Can Coura convince her friends she is trustworthy despite being bonded to a demon? Will they uncover the traitor manipulating those in the palace before it's too late? In the midst of their dilemma, what will happen when she seeks out the unnatural energy she once possessed?