Criminal psychologist Clara’s divorce has shattered her family, so she retreats into her work. But, instead of finding comfort there, Clara develops a growing obsession with one patient, a young woman accused of murdering her boyfriend on a remote hiking trail. Desperate to discover what happened and to mend the bonds between her and her estranged daughters, Clara makes an ill-fated decision: to hike that very same trail, with her family in tow. Once they hit the trail, however, violent visions plague her dreams, and when a close encounter with a mysterious presence splits them up, what began as a family bonding trip becomes a battle for survival. Clara must confront her own demons and the thing that prowls the forest to get her family out alive.