In the Invisible Kingdom of Sereelia, the First Heir of each congregation is duty-bound to assume leadership of their own city immediately upon turning twenty; but not before contracting marriage to ensure an Heir for the congregation in turn.Rae and Julian are the last First Heirs of their generation who have yet to take command of their own city, despite having surpassed twenty years for a while. The Queen can no longer wait for them to find true love; she orders them to marry and find a way to jointly lead their congregations, although a marriage between two First Heirs has never occurred.One is among the weakest witches on the island, the other among the most powerful. Will they manage to find a compromise?