Ruby Jones is the luckiest gemologist in the world. After all, how many can claim to have handled the famous "lost" Florentine Diamond, once worn by empresses? But her luck runs out when the diamond is stolen from ruthless businessman Guy Beauvoir. As the one commissioned to verify it, she's his prime suspect. With Beauvoir's goon chasing her all over the city, there's only person Ruby can turn to.

Jake Forrester doesn't want anything to do with Ruby, but he owes her brother big. The ex-special ops soldier turned private security agent is moving interstate, and the last thing he wants is a complication in the form of his mate's sexy little sister. The sooner he can find the Florentine and return it to Beauvoir, the sooner he can walk away.

If only it were that simple. Keeping Ruby safe is turning into a full-time job, and having her close is playing havoc with his determination to forget the secrets he's tried so hard to bury.