A trio of heroes combats the resurrection of an ancient evil. Two humans - a swordmaster and paladin of Helm named Manven Greycastle and a ranger named Khaleid - and an avariel (winged elf) cleric called Nim discover they are descendants of, respectively, a silver dragon, a succubus, and a djinni, who allied centuries earlier to defeat a mind-controlling yuan-ti vampire. The three are joined by a young wizard, Nils Hellstrom, and with the aid of their ancestors, thwart the resurrected vampire's attempt to rebuild his secret empire of enslaved minds.