K-9 officer Aiden Murphy always kept things strictly platonic when it came to KCPD criminalist Lexi Callahan out of respect for her family's having taken him in years ago. Then Lexi is attacked during a crime scene investigation, and Aiden and his dog, Blue, step right in, making their relationship even more complicated. Keeping Lexi safe is his priority. But resisting the woman who's never been far from his thoughts will be his greatest challenge this holiday season.