Moonacre.

Moonacre is a 1994 British miniseries loosely based on Elizabeth Goudge's 1946 children's fantasy novel The Little White Horse. Produced and directed by Robin Crichton, and dramatised by William Corlett, the six-part serial stars Camilla Power, Jean Anderson, and Noah Huntley. When Maria Merryweather is orphaned, she must move to Moonacre Manor with her ever-faithful governess, Miss Heliotrope, and her Spaniel, Wiggins. Maria isn't at the Manor long before she discovers that her new home has a tragic past, which she becomes determined to correct.