After twenty years in Landworld, mermaid Ismaelda Freya seeks refuge in her home habitat, Key Sirena. In all that time, she's never taken a human lover to become fully human, but neither is she willing to give up her freedom and be marked forever as mere.

The sea dragon, Sidon, can have anyone and anything he wants, except the one female who left. Using every trick he's learned in her absence, he vows to convince her to stay.

Not even a shape-shifting mermaid can keep her options open forever. When faced with losing everything she values, Isa must choose between her freedom and her one true love.