Deputy Mattie Wray, formerly Mattie Cobb, is summoned to Washington’s Olympic peninsula for an urgent search-and-rescue mission to find a celebrity’s missing child. With only a week left before her wedding, Mattie is hesitant to leave Timber Creek, but her K-9 partner Robo’s tracking skills are needed. Dense forest, chilling rain and unfriendly locals hamper their efforts, and soon Mattie suspects something more sinister than a lost child is at play. When one of the SAR dogs becomes ill, her fiancé, Cole Walker, suspects poison. Fearing for Mattie’s and Robo’s safety, Cole joins the search-and-rescue team as veterinary support. Secrets that have lain hidden within the rugged terrain come to light, and when it is uncovered that the missing child was kidnapped, the search becomes a full-blown crime scene investigation.

Deputy Mattie Cobb and her sister, Julia, travel to Mexico to visit their mother. But when they arrive, they discover that she and her husband have vanished without a trace. Back in Timber Creek, Mattie finds a chilling note on her front door telling her to look for “him” among the standing dead up in the high country. The sheriff’s department springs into action and sends a team to the mountains, where Mattie’s K-9 partner, Robo, makes a grisly discovery --- a body tied to a dead pine tree. Mattie is shocked when she realizes she knows the dead man. And then another note arrives, warning that Mattie’s mother is in desperate straits. In a last-ditch gambit, Mattie must go deep undercover into a killer’s lair to save her mother --- or die trying.

He was suspect number one --- the man who tried to kill Deputy Mattie Cobb and may have killed her father 30 years earlier. But when Mattie and cold case detective Jim Hauck reach the Colorado state prison where they will finally get to interview him, he's found dead in his cell. There's only one clue: a map leading to Timber Creek and rugged Redstone Ridge. Mattie and her K-9 partner, Robo, journey into the burned forest surrounding Redstone Ridge. But before they can finish their search, they're called to help investigate the death of a young woman found in a campground filled with elk hunters. Identification of the deceased points to her having recently given birth, but the infant is nowhere to be found.

Officer Mattie Cobb and her K-9 partner, Robo, stumble upon a body floating at the edge of a lake. Robo catches human scent, which leads to an enigmatic forest-dweller who quickly becomes the prime suspect. Mattie identifies the victim and discovers an odd religious cult whose dress and manners harken back to the 19th century. As the list of suspects grows, an unexpected visit from members of Mattie's long-lost family sheds new light on her childhood as they help Mattie piece together details of the fateful night when she was abducted at age two. The tangled threads of the investigation and family dynamics begin to intertwine --- but darkness threatens to claim a new victim before Mattie and Robo can track down the killers.

An explosion outside a community dance sends Mattie Cobb and Cole Walker reeling into the night, where they discover a burning van and beside it the body of outfitter Nate Fletcher. But the explosion didn't kill Nate --- it was two gunshots to the heart. The investigation leads them to the home of rancher Doyle Redman, whose daughter is Nate's widow, and the object of one of their suspect's affection. But before they can make an arrest, they receive an emergency call from a man who's been shot in the mountains. Mattie and her K-9 partner, Robo, rush to the scene, only to be confronted by the ominous growl of a wild predator. They journey into the cold, misty mountains to track the animal --- but discover something even more deadly.

Colorado’s Redstone Ridge is a place of extraordinary beauty, but this rugged mountain wilderness harbors a horrifying secret. When a charred body is discovered in a shallow grave on the ridge, officer Mattie Cobb and her K-9 partner Robo are called in to spearhead the investigation. But this is no ordinary crime --- and it soon becomes clear that Mattie has a close personal connection to the dead man. Joined by local veterinarian Cole Walker, the pair scours the mountaintop for evidence and makes another gruesome discovery: the skeletonized remains of two adults and a child. And then the unthinkable happens. Could Mattie become the next victim in the murderer’s deadly game?

When Deputy Ken Brody's sweetheart goes missing in the mountains outside Timber Creek, Mattie Cobb and her K-9 partner, Robo, are called to search. But a dark snowstorm is brewing over the high country, and they're already too late. By the time they find her body, the storm has broken and the snow is coming down hard. Brody hikes down to bring back the forensics team, and veterinarian Cole Walker gathers supplies to protect them from the storm. As their investigation develops, Mattie, Robo, Brody and Cole find themselves in the middle of the killer's stalking ground --- where the hunters have just become the hunted.

When a young girl is found dead in the mountains outside Timber Creek, life-long resident Officer Mattie Cobb and her partner, K-9 police dog Robo, are assigned to the case that has rocked the small Colorado town. With the help of Cole Walker, local veterinarian and a single father, Mattie and Robo must track down the truth before it claims another victim. But the more Mattie investigates, the more she realizes how many secrets her hometown holds. And the key may be Cole’s daughter, who knows more than she’s saying.