Synopsis: "When the Nightbroom turns to blood, then will Satan come to enlarge his sphere. They called the comet's fiery tail The Nightbroom, and slowly at first, then in a maddening rush, panic spread. Many claimed to see the terrifying face of Satan emerging in the flames, igniting the night sky. And every night it grew bigger ... came closer ... His time has come." — quoted from the Ace paperback's back cover.