I-A-S Case : The Waterlogged Gem

The middle of Mercantour Park, a great forest in France. They all are citizens of nearby villages/towns and some were campers/hikers but some not even from same country. All of them went missing in the past seventeen days and one older woman died from the cold as they were completely naked. Odd thing was that they recalled they were lying around in a circular shape and no one remembers how they got there. The police unit in charge of the case has a senior detective, Jerome Bouchard, who recalled something like this had happened when he was a rookie and dug out some information. In 1997 in the same national park, a large group of people were found around the same area but unfortunately that spring was a colder one and 6 people died.

No one knew each other and no one remembered how they got there, so Detective Bouchard definitely suspects something supernatural and emailed Aurum. Your job is to get to the bottom of the case, try talking to the victims if it helps. Do your best to find out what kind of phenomenon this is and if it is possible make sure it never happens again.