Donny, a trucker for W.E.C. Coal, runs over and kills Kharis Redwater, an anti-mining activist, while Kharis walks alone at night on an indigenous people reservation. Tribal police officer Betty Stonechild consoles Kharis' mother Mary Lynne while investigating the case with mountie Andy Evanshuk. Diner owner Frances helps manage the body. WEC surveyor Beth brings her fiancé Ray Patel with her to help assess the land for a coal mining operation. Beth complains of a foul smell while a blackbird circles overhead. An invisible entity suddenly mauls Beth to death. Betty and Andy investigate, but question Ray's unbelievable account of what supposedly happened. Donny harasses game warden Stacey Cole, an Army veteran with PTSD, outside Frances' diner. Stacey pistol-whips Donny in his face, which results in her suspension. Gary, a poacher working for WEC, parks on the reservation to drink beer with his girlfriend Jessica. Gary complains of a foul smell while a blackbird circles overhead. The invisible entity suddenly kills Gary. Betty and Andy are stunned at the similarities between Gary and Beth's unusual deaths. Because Stacey is an expert tracker, Betty deputizes her to help with the search for whatever is stalking their reservation. Stacey enlists additional help from her uncle Carson Stonefeather, who is a respected tribal elder. The invisible entity attacks Carson while he and Stacey hunt for it. Stacey rushes Carson to the hospital. Andy dismissively speculates that drug addiction or mass hysteria is responsible for what victims believe is happening. Betty defends her people as Stacey insists it was Kharis who attacked them. Carson cryptically asks, "Where is her heart?" Betty's online research reveals that Kharis was protesting against the tribal council for selling a mining license to WEC without proper approval. Additional research also connects Carson and Frances, the latter of whom appropriated native culture despite having a different heritage. Betty asks her 14-year-old nephew Ben, whom she raises, to see video interviews of Kharis and Carson he recorded for a class project. Carson's interview implies he betrayed the reservation by allying with WEC on the profitable mining operation. Betty discovers Kharis' body is missing. Betty confronts Frances, who only says that Betty should ask Mary Lynne what happened to her daughter's body. Betty then shows Stacey that her research revealed Kharis only attacked people affiliated with WEC, including Cars