Emma and her Syrena love, Galen, need time together. Alone. Away from the kingdoms of Poseidon and Triton. Emma's grandfather, the Poseidon king, suggests the two visit a small town called Neptune. Neptune is home to both Syrena and Half Breeds alike. But Emma and Galen didn't sign up to be peacemakers between the ocean and the land-dwelling, freshwater Syrena. They didn't bargain for meeting a charming Half Breed named Reed, who can barely disguise his feelings for Emma. And they especially didn't expect to find themselves in the middle of a power struggle that threatens not only their love, but their ocean kingdoms.