He was hired to kill her.

Instead, he sets her free.

Siren princess Rosalie Morgan is forbidden to leave her tank. Her unwieldy emotional magic poses a danger to the queen, who refuses her greatest wish: exploring the world beyond the glass. After years of learning to control her magic, Rosalie knows she's ready to see more of the sea, but Mother disagrees. And if she won't let her out, no one will.

Until the night of her twenty-fifth birthday, when a dark intruder puts a knife to her throat.

Running from his past and drowning in debt, deep sea assassin Sebastian “Malice” Valomir would do anything for money—even murder a princess. But when he lays eyes on Rosalie, for the first time in his career, he can’t make the kill.

So the princess strikes a bargain. She’ll pay Malice double the price of her own bounty, if he’ll be her muscle while she explores. But the arrangement quickly grows more personal than the unlikely pair intended, and as boundaries shatter, secrets fester. Now Malice must decide what to protect—his purse, his past, or the spirited princess who’s captured his heart.