The big problem with short stories like these is that they're...short, much too short!
Derek and Karina have been definitely not attracted to each other at all, nope! No lust here folks, just keep moving. Karina's an itch he badly wants to scratch, but she's reluctant to get involved with anyone, especially Derek. However, someone is murdering subs, so they agree to work together on a police op to try and identify the killer.
Both of these characters are great. Karina's had a troubled past, but she's strong, smart, and competent. I loved how she really was able to take care of herself without being abrasive or scarily aggressive. But you can sense how lonely she is, and how she craves emotional connection with others. Derek's a great hero, and a great match for Karina. At times Derek could be a overbearing, but he is so careful with her...and was able to dominate her without being too heavy-handed (pardon my pun!).
We meet some interesting new characters: Maia, Derek's ex, who's so awful, but intriguing. I can't wait to see if she gets her own story. And..my favorite, Clayton Hill, Texas Ranger....Mmmm........
It wasn't too hard to figure out the villain, but there was some action and suspense to move the plot along. And I loved seeing other characters from the series!
Really a great story -- just wished there'd been more of it!