But as a deadly weapon emerges from the depths of the City Beneath and rising seas inch closer to consuming all she holds dear, Basha is forced to forge unlikely alliances–including with the roguish heir to a rival clan and the childhood friend she believed lost forever. Together, they embark on a perilous journey through crumbling cities and submerged tunnels, facing assassins, betrayal, and the undeniable pull of their own hearts. But as secrets from her sister’s past come to light, Basha realizes that the key to saving her people may lie in the very mysteries that tore her family apart—and the dark bargains that could reshape their world forever.