Retired Navy SEAL Chris Cassidy knows the bro code-no messing around with teammates' sisters. But Chris never was one for following rules. Besides, Rick's sister Darci is worth breaking the rules for.

Darci Mann is tired of being alone. Since Zane, the bad boy she had a crush on, fell in love with someone else and her best friend Ali found her own happy ending, Darci's feeling her single status extra keenly. Though she suspects her brother's buddy Chris would be willing to change that . . . if she decides to let him.

When a routine assignment turns deadly and Chris switches from charming joker to capable trained warrior willing to kill or die to save Darci's life, she might have to reevaluate her feelings about the perpetual bachelor and her own future.