Private investigator Billy Parrish is good at three things-fighting, investigating, and sex. MMA training with the other vets in the Warrior Fight Club keeps his war-borne demons at bay-mostly, and one night stands ensure no one gets too close. But then his best friend from the Army Rangers calls in a favor.

Shayna Curtis is new to town and full of hope for the future. With a new job, she's grateful when her brother arranges a place for her to stay while she apartment hunts. But she never expected her roommate to be so brooding. Or so sexy.

Billy can't wait for Shay to leave-because the longer she's there, the more he wants her in his bed. To stay. He can't have her-that much he knows. But when fight club stops taking off the edge, Billy lets down his guard...and starts fighting for what's his.