Obedience has always been a matter of survival for sixteen-year-old mermaid princess Pauline. Her mother is the tyrannical Queen Calypso, who rules the kingdom of Atargatis with an iron trident. To utter one word against her would mean banishment—or worse—so Pauline bites her tongue and minds her manners. But on the eve of her sister's merling-shower, all of that is about to change. Confronted with the truth about what happens to the human men who are betrothed to the mermaids of Atargatis, Pauline realizes she can stay silent no more.