Trace was a SEAL and when his twin his killed overseas, he tries to find his dogtags. He has a one night stand with Marlena. Then a couple months later, he is told join Titan or go to jail for being AWOL.
Marlena is studying to be a biological engineer and was kidnapped and forced to create her weapon she invented. But before its finished she is rescued by Trace and his team.
Both are damaged but find peace with each other. Neither thinks they are good enough for the other.
Marlena was always leaving right after sex. Trace kept going to wanting her, to not. They both were see sawing and it was a little annoying. I know it was a short book but the sex felt rushed to me. The payback was awesome though.