The Heir, The Spare, and The Illegitimate
After America and much of the world was destroyed, Pheonixia rose up out of the ashes and became the monarchy that rules North America. Pheonixia is comprised of nine regions run by nine important families, but the most powerful region, the First Region, is run by the Love Family.
Alexa Love is the heir to the highly duchy of the First Region.
Isabella Love is the spare who wants nothing to do with monarchy.
Felicity is their illegitimate sister who has grown up in the station of a maid instead of a noble.
Each year there is an Olive Branch Festival which unites the important figures of the nine regions in a long festival to encourage relations between the regions and continue the reign of Pheonixia.
However, everything changes for the sisters when the king (their grandfather) dies. As more events occur, it seems like there is someone in the palace that is targeting Royals. With everything that is going on, everything circles back to Alexa, Isabella, and Felicity. It seems like it is these three Royals that must figure out what's going on and how to stop it as things only worsen and stakes continue to rise.
A story of lies, family, responsibility, and, of course, nobility.