Lena’s life changes the moment her husband steals her research and abandons her on Pelagia-9. There, she mistakes the siren Kael for a merman and, in trying to teach him how to court, ends up becoming the one he claims. Drawn underwater and taken as his own, she later discovers he is the child who saved her years ago—and has waited sixteen years to find her again. When rescue finally comes, will Lena go back, or stay where Kael has been waiting?