Set in 1982, the story follows Finney Blake, now 17, who uses marijuana to numb the PTSD from his kidnapping. His 15-year-old sister, Gwen Blake, begins experiencing vivid, "grindhouse-style" psychic dreams of three young boys murdered decades ago at a Christian winter camp called Alpine Lake, as y/n also has the same dreams but never will admit it thinking it will keep everyone safer.