ABOVEThe Age of Enlightenment has come to England. Among the triumphs of science is the prediction by Sir Edmond Halley that a comet last seen in 1682 will return in 1758 -- a prediction that will soon be put to the test.BELOWA century ago, the fae of the Onyx Court fought to defeat the Great Fire of London, an elemental Dragon that destroyed four-fifths of the city. In the aftermath, they banished its spirit to a comet -- a comet that will soon return.BETWEENThe race has begun. When Halley's comet appears, the Dragon will strike, and the city will burn once more. Faerie magic alone cannot kill this monster; defeating it for good will require the aid of science as well. But science brings its own form of danger .