Diving into the Unknown (2016)

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In 2014, four Finnish cave divers faced their worst nightmare when two of their friends drowned deep inside an underwater cave in Norway. When the official recovery operation is called off by the Norwegian and British authorities after being deemed too risky, the friends set out on a secret mission to retrieve the bodies themselves. Diving into the Unknown isn't just the dramatic story of a breathtaking and life-threatening recovery mission. It is also a story about unconditional friendship that truly runs deep.