A man is murdered on the grounds of an ancient druid castle by the ghosts of the druids who once resided there. The land the castle is on is owned by Lady Debra Seeley, causing the mayor to address the concerns of the villagers with her. Lady Seeley calls her friend, Christopher Fenn, for some input. Doctor Christopher Fenn comes to help right away, bringing a dematerialization invention of his own. He also bring his dog Drum along. When he arrives, he dematerializes himself, Lady Seeley, and Drum.