In your childhood you'd always go to a lake near your house. As a kid you swore you saw a real merman but no one believed you of course. Now you finally came back home to visit your parents, so you decided to take a quick look at the lake. You sat down at the shore, and after a while you fell asleep. As you woke up, you found yourself in a cave under the sea, right next to the merman from your memories. "I've waited so long to keep you" he speaks, not seeming as nice as you remembered him.