Everyone knows empaths don't dream.( your hook starts here--->) Reina Campbell hasn't dreamed since her empathic skills manifested when she was ten, but all that changes the night she dreams of her best friend's murder. (stop) It leaves her shaken, and when she finds Adri's body the next morning, mutilated almost beyond recognition, she's furious.(resume) She calls the police, but they shrug off the case and try to convince her that it was an animal attack. Reina knows better, and she's determined to find justice for her friend.
Unknown to Reina, Longan MacGregor, a centuries-old sire vampire, is just as desperate to find the killer as she is. When their investigations repeatedly put them in one another's way, the two reluctantly decide to join forces.(stop) As they grow closer to one another, they also come closer to finding the killer, a vampire from Longan's past whom he hasn't seen in nearly four hundred years. The reunion isn't a happy one, and it ends with Reina captured and Longan desperate to find her before she's killed -- or worse, turned and bound to the one man Longan hates over all others.
You have the two main characters. Then you blather off into the antagonist through the viewpoint of the main characters. What does the antagonist want to accomplish? He's in it for something other than being just a bad guy in the novel, right? What's HIS motivation?
Here's your hook starting point:
X is the main guy; he wants to do:
Y is the bad guy; he wants to do:
they meet at Z and all L breaks loose.
If they don't solve Q, then R starts and if they do it's L squared.