Two young backpackers, Dustin and Lauren, hike through the beautiful country landscape. They're abruptly interrupted by a rugged man, Delmar, who slams the butt of his shotgun into Dustin's head. He brings the two back to his drug dealer camp and interrogates his hostages. When Dustin learns that the two aren't cops, he still toys with the idea of killing his hostages. That is, until something lunges at him, dragging him into the brush. We hear choking, thrashing and the struggle of death. Dustin and Lauren see their opportunity and make a run for it.
Later, police and D.E.A. agents survey the crime scene. Blake's head is twisted at an odd angle; it's clear that his neck is broken. Hank notes that from the abrasions, it looks as though someone used a pretty hefty rope to choke him to death. Nick finds a suspicious piece of long brunette hair on the victim; something isn't quite right.The camp has been trashed; there's not a bit of food or any supplies left. However, the three million dollars worth of marijuana plants belonging to Delmar remain untouched. Nick, curious, moves off the body into the woods. He finds a few more strands of hair, what he doesn't see, however, is someone dropping silently out of a tree behind him. Sensing something, Nick turns suddenly, but only sees a long braid of hair and an obscured Blutbad face disappearing into the brush.
Delmar's oafish brothers, Randall and Micah, arrive at the station and take in the grim sight of their dead brother. The brothers are determined to find whoever was responsible for Delmar's death, but Nick warns them to stay out of their investigation. Though it looks like these guys weren't involved with their brother's business, Nick notes that they're still suspicious characters to keep a close eye on.
DNA testing from the brunette hair comes back and provides a surprising revelation; the hair belongs to Holly Clark, a girl who disappeared from her mom's backyard when she was seven years old, almost nine years ago. The guys get to work on figuring out if Delmar is in any way connected to the girl and where he was the night she was abducted.
Nick goes to Monroe for insight into potential Blutbad Holly's situation. Monroe explains that at age seven, Holly would still be a wild child with instincts working full time, so she'd have a decent chance of surviving on her own. Since Holly was adopted, it was possible that she had parents who didn't understand her situation. Nick convinces Monroe to go back out into the woods with him and search for Holly, hoping that Monroe will "creature with her" and give her someone to relate to.
Meanwhile, Blake's brother Randall has been following Dustin, one of the two campers held hostage by Blake. Convinced this guy had something to do with his brother's death, Randall kidnaps Dustin, knocking him out with the butt of his gun. When questioning leads to the same dead end that Delmar encountered, the brothers decide to trek into the woods to seek out their brother's killer.
Monroe and Nick make their way into the woods. Monroe follows his nose until he picks up on Holly's scent, arriving at her territory. When the two discover Holly, she reacts violently until Monroe morphs as she does. She suddenly stops, staring at Monroe, surprised and shocked. Frightened, Holly takes off and loses Nick and Monroe; she knows these woods better than they do.
Hank tracks down Holly's mother and explains to them that they're re-opening the investigation. Hank asks of any connection their family had to Tillamook forest. She explains that they went camping there a few times, but they had to borrow equipment from their neighbor, Jimmy Addison, who moved away years ago. On a hunch, Hank decides to track down Jimmy Addison to question him further.
Monroe and Nick finally discover Holly's "tree house," a very simple structure made of wood and metal siding. Holly is de-morphed, passed out on sleeping bags in the corner. Blood soaks the side of her shirt; clearly she's been injured. Monroe cautiously approaches and finds Holly weak and docile, as Monroe and Nick treat her wound.
With the help of Sgt. Wu, Hank is able to track down the location of Jimmy Addison. The only problem is his alibi is rock solid; he was bit by a dog while hiking and was being treated at a hospital at the time of Holly's disappearance. Suspiciously, the hospital Jimmy was being treated at was far away from the site of the supposed dog bite; he had much closer options. Hank and Sgt. Wu decide to investigate further.
Hank and Sgt. Wu question Jimmy, who gradually loses his cool as the questions progress. When Hank asks why he drove all the way from Mt. Hood to Beaverton to get treated, it's clear that he's struck a nerve. Hank brings Jimmy downtown to make a formal statement.Holly needs some help; their first aid kit isn't cutting it. After noticing the name "Addison" on some camping equipment, Nick makes his way back to civilization and leaves Monroe with Holly. Nick calls Hank, revealing that he's found Holly Clark alive in the forest. He also reveals that the name he found on an old camp stove was Addison. Hank notices Addison starting to hyperventilate. He tries to run, but Hank grabs him. Addison, frantic, screams, "Oh my god, keep her away from me - she bit me! She tried to kill me!"Monroe decides to go get Holly some Burdock root in the forest to help with her fever, but he is met by Delmar's brothers. Because Monroe was digging in the woods, the ignorant brothers immediately assume Monroe is associated with Delmar's death and hold him at gunpoint. Nick arrives on the scene just in time, gun drawn.
The four are in a standoff, when suddenly a morphed Holly makes the attack. A braided rope of hair goes around Micah's throat, snapping his head back and breaking his neck. This gives Nick the opening to shoot Randall, which he takes. It took every last ounce of Holly's strength to attack, and Monroe gathers her in his arms.
Holly is returned to her mother in an emotional reunion. While Holly is at first frightened of an unfamiliar woman, she reaches out and opens her hand, showing her mother the pink barrette she was wearing when she was kidnapped. Holly takes her hand, as mother and daughter are together again.