Seventeen-year-old Lily, half-mermaid and half-human, has been living on land and attending high school. She develops a crush on a boy but is afraid to tell him of her true destiny as the ruler of the undersea kingdom of Thalassinia.

Unrequited love is hard enough when you're a normal teenager, but when you're half-human, half-mermaid Lily Sanderson, there's no such thing as a simple crush. Especially when your crush is gorgeous (and 100% human) Brody Bennett. The problem is, mermaids aren't the casual dating type - the instant they kiss someone, they 'bond' with them for life. When Lily's attempt to win Brody's love leads to an enormous case of mistaken identity, she finds herself facing a tidal wave of relationship drama.