The Gyrth Chalice is a centuries old artifact that the Gyrth family has held in trust for the British Crown. When an international ring of thieves and killers conspire to steal the chalice, Campion and his sidekick, Lugg, agree to help protect the family name and fortune. Before long, however, they find themselves in the midst of a witches' brew of curses, spells, ghosts, and - naturally - murder.