A washed-up 1980s glam-metal band, Sonic Grave, sets out for Coachella hoping to turn a long-shot appearance into a comeback. But their road trip veers off course when they stop in Joshua Tree for peyote and find themselves under attack by something vicious and otherworldly. Stranded in the desert, the one-hit wonders must fight to survive with the only weapon they know: rock n’ roll.