When the owner of a Yorkshire coal-mine decides to mechanize to increase profits, the mine's pit ponies are scheduled to be destroyed. So, three children plan to steal them to keep them safe. But when they're caught, it's up to the mine owners and the miners themselves to decide what's right.
Alastair Sim
Peter Barkworth
Maurice Colbourne
Susan Tebbs
Andrew Harrison
Chloe Franks
Benjie Bolgar
Prunella Scales
Leslie Sands
Joe Gladwin
Jeremy Bulloch
Don Henderson
Geraldine McEwan
Gorden Kaye