Alec and his Cinderella

Alec goes to High School with Renesmee Cullen and they pose as siblings. They attend a Masquerade Ball at the High School and Alec meets a girl but at the end of the night she disappears...leaving behind a single shoe. Will he be able to find his Cinderella?

Disclaimer: I do not own the Twilight story or characters. I only own my character the reader. This story is my own.