Rainbow Dash has always been a great flyer, and an even better friend. But when a strange pony informs her that an ancient enemy that is older then the princesses themselves is rising from the shadows and only Rainbow Dash can stop it, she finds herself on an adventure of a lifetime. With help from this new ally, Rainbow Dash needs to find the power in herself and learn the full capability of her strength. But first...she must dive into Equestria's past and learn secrets millennia in the making. The fate of Equestria (and perhaps more than that) hangs in balance.