There’s a world you don’t see. Under your feet. A dark, wet, scurrying world. A muddy, candle-lit, labyrinthine world. Of immeasurable interconnected tunnels, dislodged boulders, vaulting galleries. Private dens, stone-carved temples and sprayed artworks. A world of pit-pat drips and natural springs, sagging electrical wires and bones.

A burrowing, endless honeycomb of a world under the huge, light, airy city you walk through every day. And one evening, this girl fell down the rabbit hole.