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.

Deputy Mattie Cobb is in a dark place and has withdrawn from Cole Walker and his family to work on issues from her past. When she and her K-9 partner Robo get called to track a missing junior high student, they find the girl dead on Smoker's Hill behind the high school, and Mattie must head to the Walker home to break the bad news. But that's only the start of trouble in Timber Creek, because soon another girl goes missing--and this time it's one...

Two brutal murders, a menacing band of poachers, and a fearsome creature on the loose in the mountains plunge Mattie Cobb and her K-9 partner Robo into a sinister vortex. 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...

Called to help investigate the murder of a young woman who had recently given birth on the mountain, Mattie and her team search for the missing baby while going up against a criminal mastermind who is behind several murders, including her father's.