K-9 search and rescue handler Jamie Flint and her team-both human and canine-are called in when a group vanishes during a dog sledding expedition for battered women in the Mahoosuc Mountains of Maine. When it's learned that a rogue gunman was involved in the disappearance, authorities look to the abusive partners of the women now lost for answers. Meanwhile, a voice from Jamie's past begins to haunt her, echoing the words of the shooter now in pursuit...