Years of war between the Children of Air, Land, and Sea have exhausted the lives and resources of its people. Nobles and royals must spend twenty years at least serving as peace healers to those who were devastated during these conflicts. Ishana, the youngest of her sisters, remains alone in the old Fortress of Elspeem, preparing for her time to go forth and serve. But a young mermaid, Uaso, changes everything when she rescues a drowning man and turns to Ishana for help. Though barely thirteen years old, Uaso wishes to marry the man and begs Ishana for her help. Ishana finds herself conflicted because of Uaso's youth and her own feelings for the stranger. And a bad situation becomes worse when a fae princess is murdered at the time of the mermaid's shocking arrival and transformation.