Marco is starting to spiral. He knows it. His team knows it. Everyone around him can see that he's just a bomb waiting to explode. The only woman who can bring him back from the brink might be the only woman who can bring him back from the edge is also the woman who lit his fuse.

Ever since the demon Asmodeus tried to murder Marco, Amanda Colt has been hunting down every lead to find the one ultimately behind the attempt. After months of investigation, she learns that something in the dark is colder than the dark. It is a vampire assassin that Amanda has faced once before, and Amanda lost.

This assassin is stronger than anything they've face before, and it isn't alone. With Marco ready to self-destruct, and the armies of Hell ready to descend, the three of them must come together and stop a thousand-year-old assassin that has has never been stopped, and has never failed to kill her target.