Summary:

Half siblings Dmitry and Amitaf Triglav are assassins and mercenaries for the Russian government. As if their career choices didn't make them odd enough, they're not human.

Their father is half siren, a part bird, part human creature that leads others to their deaths with its songs, and half shapeshifter, a creature that can modify is DNA to match that of other creatures. Dmitry's mother was a giant, and Amitaf's was a mermaid.

With their years of training, supernatural abilities, and their hunters' instincts, there is nothing they can't handle.

But when their father's cover is blown while on assignment in the States, will they be able to find him before it's too late?