A dreadful event from her youth has left Grace Walker (Reeves) mentally scarred. Now, these suppressed memories only surface in her dreams as fragmented nightmares that leave her shaking in a cold sweat. With the help and love of her boyfriend, Jim (London), and daily medication, she's able to live a normal life and seal off her past. That seal is shattered when, while taking a hike through the mountains, a tragic accident leaves Grace stranded to face the merciless elements. Struggling against the rugged terrain, her fight for survival becomes more terrifying when she realizes that something inhuman is now stalking her through the woods.

As starvation and the grueling elements begin to take their toll, Grace is confronted by frightening memories that threaten to consume her mind and sanity. It's only after she's forced to make a ghastly choice that leaves her emotionally stunned and horrified that Grace is able to face the fragmented memories of Momma (Charisma Carpenter) and Daddy (Lee Perkins). And as past and present merge, Grace finds a gruesome key to survival hidden in the forgotten past, though using it may change her forever.