Rumours about Secret Street circulate the playground. For Paris, Secret Street might as well be a wonderland down a rabbit hole. Her unsuccessful search does result, however, in an unexpected fascination with geology. This takes her on an adventure, where she hides her interest from friends, goes on a disastrous pony trek, apparently saves the Earth from meteorites, and faces a clifftop crisis which leaves her in great danger. Through all this, she begins to understand the epic stories to be found in the rocks beneath her feet, whilst also uncovering hidden secrets in her own life.