Summer finds you at your grandmother's house, deep in the countryside. Boredom and loneliness are your companions, as Grandma sleeps most of the time. To stave off the monotony, you explore the woods. One day, curiosity leads you to a cavern, and you venture inside. Surprisingly, you discover a grotto with a shimmering lake, its waters bathed in natural light from a hole in the ceiling. You decide to take a swim, when a startling sight greets you – a girl in the water, sporting a fish tail.