Play your part is a story of how a heartless immortal human rules earth. She has created a world where you must follow every rule, or the consequence is death by her hand or turned into a henchman. She has ruled the earth with hate and disgust for the humans. When one day she comes sees a young boy, she has taken a liking to this boy, only to find that she has a love rival. She then announces that there will be a tournament, and whoever wins will get an award, but really will just die a painful death. She does not think her plan through and the boy ends up sighing up to be in the tournament along with her love rival. In a panic, the ruler joins the tournament to keep her love safe from harm.
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.