The butterfly experiment - BTS ff

Every year in early June, 30 South Korean citizens are randomly selected to head through the fog on a large, grey boat, leaving they're friends, family and phones behind never to return again. No one knows where they go and no one knows what happens. it's been a mystery to the country since it started 5 years ago. People have tried everything to find out what happens to the people who leave, trackers, cameras, map and even following the boat but every time the trackers are removed, the cameras history is mysteriously deleted and every boat that's tried to follow along is lost in the fog. People have ideas of where they may go from the map but no one knows for sure. Rumours constantly circulate about what happens to the 30 people. Do they get dropped of in the middle of the sea? Do they start a new life on the island they go to. But the truth may be much more unexpected than anyone could have guessed.