Sophie Gray and her brother, Jack, are able to leave the orphanage they stay in when they inherit a cottage when their Great-Uncle Lional had left them. They find a secret passageway in the cottage that leads to Black Scar mine. There they help the poor boys who slave in the mine for the sinister Silas Morgan.
- Translated into Dutch: Debbie Parade Album #34
- The Night Owls – Bunty: #1292 (16 October 1982) – #1309 (12 February 1983)