In the time before time, Satan ruled the molten Earth, worshipped by his demons. One demon turned against him and imprisoned Satan deep in the bowels of the earth. When Satan escaped, as punishment, the demon's heart was torn from his chest and his body hidden deep in the polar ice. Only Satan knows where he lies. The heart is hidden elsewhere. If the two are brought together, the demon will be reborn and darkness will reign. Edgy Taylor sees demons when nobody else can. Edgy thinks he is insane and expects to be carried off any minute. He is a prime collector, wandering the streets of London collecting dog muck for the tannery. The only thing Edgy is good at is setting and solving riddles, and evading his brutal and abusive master. One night, when his master seems genuinely intent on killing Edgy, Professor Envry Janus intervenes. Envry takes him to the Royal Society of Daemonology where Edgy will now live. It is here, though, that Edgy discovers chance had nothing to do with their meeting, and that he holds the key to a deadly demon prophecy.