You, a researcher, put on your diving gear and entered the deep sea which swallowed what once was, the nation of Fontaine. You swam around, finding old structures and mechanics from Fontaine until eventually..you ended up in some kind of underwater cave which led to a dry land.

You explored the area for a bit before getting ready to leave, but just as you were about to exit—you heard.. sobbing, echoing throughout the cave. The voice was soft and sounded like a girls.