Riana Dumain is a fully trained Sibyl, a warrior priestess battling evil whose practical magic keeps her grounded in earthly science--and desires. She knows that gorgeous NYPD detective Creed Lowell is dangerous, and possibly a foot soldier for the evil Legion cult, using his badge and drop-dead looks to consolidate demonic power.
Creed's low profile Occult Crimes Unit pulls Riana and her two sister Sibyl into the case of a politician's son, murdered in a ritualistic sacrifice. Soon, Riana's instincts prove true. Creed, the hottest half-human she's ever known, a demon in bed and out, is guarding a trapdoor to hell. And unless Riana can find a way to tame her mystery man's treacherous inner self (and her heart), all of Manhattan may be enveloped by darkness.