After befriending and assisting in the redemption of Adagio and Sonata, Sunset finds Aria to be unusually resistant. Stumbling upon the siren in the most unlikely of places during the holiday season, she begins to suspect that more is at play than just Aria's stubborn nature.

While nothing dark befalls the characters during the story, some heavy topics are discussed at length by the characters: Depression, Mortality, Rape.