Beth gets jealous when Mick works on a case with a female photographer who bears a striking resemblance to his ex-wife. Beth then researches the woman's past and discovers the mystery lady isn't who she claims to be.
Moonlight follows Mick St. John, an immortal vampire and private investigator and his struggle to exist after he was bitten 60 years ago by his vampire bride on their wedding night. It also follows his internal torment as he falls in love with one he should not, one who is mortal named Beth, a news reporter, as well as his dealings with the woman who made him a vampire, his sire Coraline.