Three generations ago Captain Vidarian Rulorat's great-grandfather gave up an imperial commission to commit social catastrophe by marrying a fire priestess. For love, he unwittingly doomed his family to generations of a rare genetic disease that follows families who cross elemental boundaries. Now Vidarian, the last surviving member of the Rulorat family, struggles to uphold his family legacy, and finds himself chained to a task as a result of the bride price his great-grandfather paid: the Breakwater Agreement, a seventy-year-old alliance between his family and the High Temple of Kara'zul, domain of the fire priestesses.