Tempest

One of the first Fallen on Earth, ancient vampire Calista has been God's scalpel, a Horseman of the Apocalypse. Having lived countless lives, Calista is known as Emily Devereaux today, but in London, late 1800s, she was known as another … The last victim of Jack the Ripper. Her weakness that night left her broken, a shell of the powerful creature she was.

Vampire and head of the FBI’s top BAU team, Sabastian Holmes is hunting a ritual killer. Sabastian thinks Jack is back to continue the chess match he started over a century ago.
Since the fateful night he discovered the dying Calista, Sabastian has been her protector. Now their forbidden relationship threatens to be used against them.

Unbeknownst to all the players, Jack’s machinations have exposed those hidden. War is coming and the forces of Hell have been secretly preparing in the shadows for centuries. Battle lines are being drawn and allegiances are yet to be declared, a tempest is building on the horizon.