I'm in a place that seems like a cave because it's completely dark and there's only water. I'm with a friend and we swam here. There's an area with a wooden structure like a pier but it doesn't connect to anywhere. I briefly see a light in the water that shows there's a paddle floating. My friend wants to go explore and I'm scared. I'm telling her not to leave me here because I can't swim well and she's telling me to hold onto something and I'm saying there's nothing here and she's saying there are those mooring posts but I don't want that.