Darkness Calls to humans as well as vampires. . .

When FBI Agent Diana Reyes fell in love with Ryder Latimer, she knew that her life would never be the same. But her vampire lover brings passion into her life and Diana thought that and his love would be enough. Now she has her doubts if she can stay in his world. His darkness connects with something deep inside her, something that scares as much as it restores her life. But at times, she finds herself wishing for a "normal" life.

Ryder understands that his lover has fears about returning to the darkness that had once claimed her life.  He has fears of his own, namely losing her after a lifetime of being alone.  He doesn't know what he would do without Diana in his life. When an FBI investigation pulls Diana into a dangerous and dark mission, Ryder is forced to make a choice: Can he let his lover go or will he bring her into his world forever, even if she will hate him for eternity?