SECRECY IS SAFETY. SISTERHOOD IS EVERYTHING.

Mermaid Glacia Andraste is no stranger to the Merworld’s fanatical policies. As an instructor of mandatory combat curriculum, Glacia drills the rules into young mergirls’ heads. The most critical directive: Humans are the enemy. Fraternization is punishable by death.

When Glacia meets Tucker Denet, the rules of the game change. Glacia finds herself inexplicably drawn to this perplexing and caring human. She struggles to reconcile duty to her mermaid shoal with her dangerous attraction to the tempting man she cannot shake.

Stakes rise exponentially when Glacia’s niece goes missing and Tucker is the only one who can help track the kidnapper. No amount of training prepares Glacia for the crime circle she discovers and secrets she unveils. Glacia finds herself at a crossroads where she must decide whose rules to follow. Who she can trust. And ultimately…who lives and who dies.