It's the summer of 1984, the perfect time to be 15 years old and free. But when neighborhood conspiracy theorist Davey Armstrong begins to suspect his police officer neighbor might be the serial killer all over the local news, he and his three best friends begin an investigation that soon turns dangerous.

A wagon train of three families has hired mountain man Stephen Meek to guide them over the Cascade Mountains. Claiming to know a shortcut, Meek leads the group on an unmarked path across the high plain desert, only to become lost in the dry rock and sage. Over the coming days, the emigrants face the scourges of hunger, thirst, and their own lack of faith in each other's instincts for survival. When they encounter a Native American, they must choose...

Friends, Kurt and Mark, reunite for a weekend camping trip in the Cascade mountain range east of Portland, Oregon. For Mark, the weekend outing offers a respite from the pressure of his imminent fatherhood; for Kurt, a long series of carefree adventures.

"Fifteen-year-old Charley (Charlie Plummer) finds acceptance and camaraderie at a local racetrack where he lands a job caring for an aging Quarter Horse named Lean on Pete. The horse's gruff owner, Del Montgomery (Steve Buscemi), and his seasoned jockey, Bonnie (Chloë Sevigny), help Charley fill the void of his absent father. But when Charley discovers that Pete is bound for slaughter, he takes extreme measures to save him, as Charley and Pete embark...