Event Horizon — Evelyn Shepherd

Valentine's Day turns into a nightmare when an ancient vampire burns her way through greater Columbus, ushering in the Aztec God of Death. Partners Theo and Carlos will have to set aside their personal problems in order to put an end to a deranged killer. But as the body count rises, they find they're going up against more than a vampire--they're going up against each other.

In the midst of the chaos, Theo faces even more personal turmoil. When new lover Lloyd confronts Theo about his feelings, Theo isn't sure whether his heart still belongs to Carlos or if he truly cares for Lloyd. If he wants to save the world, Theo will have to overcome his troubled heart and harness the power within.