Miserere

Everything has a price, and those who deal with the devil pay dearly in this enthralling dark fantasy about redemption, sacrifice, and a Hell-bound battle between good and evil.
Exiled exorcist Lucian Negru made a choice that has haunted him for years. He abandoned his lover, Rachael, to Hell to save the damned soul of his sister, Catarina. But Catarina doesn't want to be saved. Now a prisoner in his reviled sister's home, Lucian is being used as a tool to help fulfill Catarina's wicked dreams: unleash the demons of the underworld to wage a war above.
Lucian's first step in thwarting Catarina's plan is to make amends with the past. Escaping captivity, he is determined to find Rachael even if it means entering the gates of Hell itself. Only then does he cross paths with a young girl fleeing from her own terrors. With the frightened foundling in tow, Lucian embarks on a journey to right a terrible wrong, to protect the innocent, and to rescue the woman he loves.
But no one escapes Catarina's wrath. She's just as driven in her pursuit: to track down her brother wherever it leads. And when she finds him, and she will, she vows to turn his heart to glass, grind it to powder, and crush the souls of everyone he loves.