Ok so this story is about a girl whose family died and she has one older sister left, who cared for fireflies. One day she disappears and all left is a picture she has never seen before. A picture with fireflies. As a result the girl in the picture desperately wishes to see fireflies as it is the only source of her happiness, and because her sister once said 'when everything is down, look up and there will be light.' Song - Fireflies by Owl city