The Queen of Darkness lives in the shadow of the mountain Mam Tor. And with her is her child, Blue John - a creature the Queen made from the two things she couldn’t bear to leave behind when she descended to the caverns, the icy purple-blue heart of the glacier and the hot gold light of the sun. Blue John is forbidden to leave his mother’s side, but the lure of the light above is too strong. When a singing, dancing girl comes to the caves, Blue John must make a choice between darkness and light. A heart-warming story that embraces the beauty and colours of the natural world.