Cassie Quattor has convinced herself that she was dreaming when she thought she met a unicorn at a young age. But everything changes when she runs away from the torment and finds herself in Equestria. With the help of a pegasus called Raindrops, a unicorn called Sparkler and an earth pony named Bon Bon, she must find the mane six, her special unicorn and her real self, before it's too late.