When Theo defeated his old guardian, Dr Saint, in a fierce, fiery battle, he thought his enemies were routed and the bad old days were over for good. But now the terrible slithering, seething crelp are bubbling up from below ground to snatch people and harvest their bones. Deep beneath the city, an ancient force – one that could threaten even Theo the Candle Man's power – is getting ready to burn, burn, burn. Twisted, charred, faceless Dr Pyre has a plan, and a secret that will shock Theo to the core. Theo will have to descend once more into the dark, slimy tunnels to fight strange creatures and ally with old enemies. Can the Candle Man find a way in the dark this time?