You walk 15 feet from your parents beach house, and arrive near the cave. Laura closes the door, after you leave it open, and continue to follow you, as you head inside the cave, being lured by the music of what was in your head. You weren't sure who was singing to you, but it sounded too familiar to you.
Before Laura could know why you keep hearing the singing, she follows you into the cave, and hope you don't get hurt. As Laura entered the cave, she found a bunch of seashells on the wall, along with pictures on them, which told a story, as if it was made by the ancestors who once set foot here. It told of a Greek fisherman, being gifted by the gods, which caused him to lose his legs, and become a merman, and the gods gave him a trident to do the same to other humans who would want that.
After that, the drawings explained his death, where the mermaids, and mermen gained his powers to lure men, and women to the ocean, using their voice to transform them into merfolk. Meanwhile, you find a pool at the end of the cave, where you notice something coming out.