Family comes first. Desire second. At least, that's how it's supposed to be...Lucian has better things to do than hunt down a creature who may or may not exist-a siren whose singing voice can heal anything. But with his brother's life depending on his success, he sets out, only to be distracted by a woman whose beauty is enough to stir the desire he'd long ago thought was gone. Unfortunately, courting her is as dangerous as the enemy hunting them down, for Siovon would rip his heart out before allowing him to find her sister.Siovon doesn't trust Lucian, no matter how much his every touch ignites her passion. After being held captive for the last decade, she will do anything it takes to find and protect her sister-including lying to strike a deal with the handsome vampire. If giving up her life means Calysta would be safe, then so be it. However, the more time she spends with Lucian, the harder it becomes to ignore the powerful truemate call binding them together.The line between true love and duty to family becomes blurred in this battle of the hearts, but Siovon and Lucian will learn the hard way that some sacrifice might be worth it in the end. That is, if it doesn't tear them apart first.