Into the Gravel Pit follows two intersecting stories of finality and consequence. Miley, Carter, and Isaiah, lifelong friends bonded by their love of exotic drugs, decide on one last hallucinogenic trip before entering adulthood. What begins as an extraordinary high quickly spirals into a harrowing nightmare, testing their friendship and leaving them to grapple with the destructive consequences of their choices. Meanwhile, Madge and Edgar, an elderly couple facing the impending loss of their terminally ill daughter, Sarah, make a drastic decision: a suicide pact to die alongside her. As the two narratives collide, Madge and Edgar unknowingly stumble into the friends' drug-fueled nightmare, where love, loss, and terror intertwine. Both groups are left irrevocably changed, forced to confront the fragility of human connection and the weight of their decisions.