Danger lurks, even in paradise...

When Isla is captured by the king's Guardians, an elite group of soldiers, she has two choices: a mercy killing at her brother's hand or a suicide mission to a mystical isle.

As the last descendant of the sirens, she is the key to unlocking the barriers that have kept humans out of the sanctuary for centuries. But when the king tasks his bastard son and head of the Guardians, Bastian, to escort her to the island, she knows there's no chance for escape. Bastian will do anything to ensure the mission is completed, sacrificing his rigid morals and his own safety to provide power to a despot.

The island is steeped in myths of dangerous magic, but Isla's been kept in the dark about what they're seeking. Instead, she stumbles on something equally perilous-a connection with Bastian that could save or damn them. As Isla and Bastian's dynamic turns into passionate romance, she must choose between saving themselves or putting their entire world in jeopardy to a dark, insidious magic.