Adair Beddoe has lost everything.

Devastated by the disappearance of her father at sea, she makes a deal with darkness in the midst of her grief. But when she refuses to sacrifice what she loves the most, there is nothing standing between her and the debt of death except...

Ramiziel is no stranger to loss.

As one of the Grigori, the fallen angels who could not resist the beauty of women, he is no longer bound in hell for his sins and walks the world at night. But even this freedom comes with fangs and a price: every century he must marry a human and attempt to sire the prophesied Beast.

When he happens upon a desperate dying woman one night, he offers her a chance at redemption by his side.

Together Rami and Adair form a powerful bond, but when secrets long kept are finally brought to light, a dramatic change of heart becomes the catalyst that alters their lives - and the world - forever.