Orphan Polly Marsh worked at forbidding Grimstone Grange, owned by Harriet and Nathan Gaunt. Polly discovered that they kept imprisoned, Louise Lumley, believed to have died along with her parents in a fire at Grimstone Grange. Risking her life, Polly climbed into a derelict mill to help Louise escape.
- Artists: Carlos Freixas
- The Dark Secret of Grimstone Grange – Spellbound: #09 (20 Nov. 1976) – #18 (22 Jan. 1977)