Good vampires go to heaven

Two-thousand-year-old vampire demon Zeb is supposed to spend eternity turning mortal sinners into bad guy Lucipires like himself. That way, they can grow their numbers and fight the vampire angels known as Vangels. But Zeb is a bad boy in a good way-secretly working as a double agent for none other than St. Michael the Archangel in hopes of one day earning his wings. Problem is, Zeb's betrayal is discovered.