More than 4,000 meters below the ocean’s surface, the camera drifts through eternal darkness. Glowing deep-sea creatures and fragile ecosystems appear in surreal beauty. Director Eleanor Mortimer's debut explores this last frontier, threatened by deep-sea mining. As scientists race to study unknown species on a 51-day mission, the film shows: we’re only beginning to understand what’s already at risk. With poetic ease, humor, and a rich soundtrack, this immersive journey sparks wonder and urgency.