As noted, this is the first of a series and it's an ensemble story. There are many characters, but the main plot line is carried by Sam, chief of a Hate Crimes FBI investigative unit based in NYC and Mac, manager of a gay sports bar in Houston. Sam is an open bisexual, and Mac is a closeted gay man. The meet at LaGuardia during a moment of intense change for both men and the attraction is instant. 
 Sam has a bad history with relationships, so he doesn't do them--not in the ten years since his wife divorced him. He has deep scars and keeps everything in tight control to keep himself separate. He is currently on the hunt for "Lev" a serial killer hunting down and killing gay men, wrapping their bodies in canvas painted with homophobic scripture. He's also just rescued his sister and nephew from his abusive bro-in-law, and fears the domestic violence stems from homophobia against his possibly questioning nephew. Meeting Mac is serendipitous, and allows him to take his mind from his worries--for a night. Until Sam wants more. 
 Mac is the only child of a wealthy and polically connected family in Texas. His outspoken domineering mother has forbade Mac from coming out--cajoled him and convinced him to delay coming out--for more than a decade, but his father has retired from politics and the particulars of his agreement is nearly at it's end. He has two adopted children, twins who are mothered by his best friend, Amy, and, now that their 5 year arrangement is almost up, Amy is balking and trying to shove Mac into his closet. Plus, his down-low boyfriend Travis has recently married a woman and left Mac behind. Meeting Sam in NYC allows Mac to experience passion with a man who treats him as an equal and has no shame in meeting his every sexual demand. 
 Meanwhile there are lots of secondary characters who are all interrelated between Mac and Sam. Close friends who have met one or both, but never learn that they are an item because they are not. Sam is adamant that they are a one-off. But then they meet again. And again. Despite Sam's very rigid rules to keep himself from getting involved/attached he bends and breaks his own rules to spend more time with his sexy Texan. Oh, and there's a serial killer to find. 
 This book ends with an HFN resolution and the killer still on the prowl . Mac and Sam do decide they are more than casual, but how much more remains for the next book. I liked the story, and the characters, but it was a little long on description of accessory characters. And, I wanted the crime issue to be wrapped. Still, it was a very compelling read and I jumped right into the sequel.