The Legendary Superpower

"Superpower? Yeah, right!"
Ruby doesn't believe in superpowers even after witnessing one herself: Her and her parents were on a ferry and suddenly it split in two. She watched as her parents drowned, but she didn't because something flew out of the sky and placed her on land. Before she was able to see who it was, they flew away. Now, years later, she is haunted by the same question: Who was the person in the sky? One day, she accidentally discovers that her parents were involved in something and that was what caused their deaths. She sets out to find what it is, and what she discovers is appalling.