What happens when the right thing to do is the wrong choice for your heart?

FBI Agent Terri McKinnon always knows the right thing to do. She is a decorated officer who knows procedure like the back of her hand. She is, in a word, unflappable—until she meets Dr. Jennifer Rosenberg, a college professor with a questionable past, who may also be a key witness in a series of violent crimes. The last thing Jen wants is a by-the-book cop in her life, but fate has other plans.

Terri is drawn to the unconventional Dr. Rosenberg and the attraction appears mutual, but the rules are clear—this woman is off-limits. Can Terri's well-ordered life stand the whirlwind that is Jen Rosenberg? More importantly, can Terri protect her when Jen's past comes back to haunt her? Or will Agent McKinnon find herself On Dangerous Ground?