Synopsis: “A group of gadget-addicted teenage girls come together in Idaho to work through a program run by psychologist Nancy. It’s a program about change, losing dependency on technology and forming real relationships. They set off up river in a houseboat, but are soon forced to moor and camp on a riverbank in the middle of nowhere. During the night, a strange, aggressive couple moors beside them, harassing the group. When the couple departs the next morning, Nancy decides to leave the girls briefly to get the boat fixed. The drifters return, setting out on a murderous rampage, hunting the girls down one-by-one through a thick, claustrophobic Idaho forest.”