Abby Brown runs a bar that doesn't open until sundown, since she and many of her customers are vampires who don't venture out in the sunlight. For a few hours each night they share the bar with humans, but after closing time it becomes their haven. 

Detective Leo Stryker thinks opening at sundown is a gimmick, one the proprietor carries too far. Abby is beautiful, and more intriguing than she should be. And she won't give him the time of day, no matter how hard he tries. His charm gets him nowhere with her.  

When a Sundown customer is brutally killed Leo wants Abby's help to solve the case, since the bar was the last place the victim was seen. He thinks he's looking for a vicious psycho. 

Abby knows he's looking for a vampire.