In the land of Artemis, there are four great Empires that coexist with each other. Each Empire represents one of the four seasons: Spring, Summer, Fall, and Winter. The four Empires are responsible for changing the seasons year-round.
Located deep within the countryside of the Summer Empire, Lucy is a young girl who lived her whole life at Sunnyside Orphanage. Having unique sterling blue hair causes her to be bullied and abused by the children and caretakers in the orphanage.
One fateful day, a novel falls out of the sky which lands right into Lucy's hands. Out of curiosity, Lucy decides to read the novel. The novel describes the blossoming romance between the heroine Silesia, the daughter of a Count, and the male lead Aster, the Crown Prince of the Summer Empire.
After reading the romance novel, Lucy was in disbelief. The villainess of the novel had the same name as her and to make things even weirder, the villainess also had the same sterling blue hair color as her.
Uneasy by the coincidences, Lucy memorizes the novel page by page and soon finds out depending on what actions she takes, the contents of the novel would slightly change.
Lucy knows that this is not a coincidence. The novel is able to foresee her future! Determined to change her fate, Lucy runs away from the orphanage and escapes to the neighboring Winter Empire.
When she steps foot into the Winter Empire, the contents of the novel change yet again and she finds out that she is the lost princess of the Winter Empire.
Deciding to meet her real father, she travels to the Palace to meet Emperor Cassius Winter and she is shocked to find out that she has three older brothers.
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In the epic conclusion to the Devil's Deal series, Freya has one final chance to discover the full potential of her own power, and to use it to restore balance in the universe - once and for all. After the destruction caused by Roisin, Ferya and Torix come to terms with their losses and mistakes... And prepare for a final battle that will change everything.