Beginning with the discovery of a kidney stone, Apple Cider Vinegar unfolds into a playful and philosophical inquiry into the deep connections between the human body and the Earth. Moving between volcanic landscapes in Cape Verde, conversations with geologists, and encounters with people whose lives are shaped by stone, the film constructs a puzzle-like exploration of how geological processes mirror those within ourselves. What begins as a medical curiosity becomes a global meditation on time, matter, and the forces that sculpt both bodies and planets. Through its essayistic structure and curious, wandering gaze, the film invites viewers to reconsider the boundaries between the personal and the planetary, revealing the hidden continuities that connect us to the world we inhabit.