Donald Crisp

Life is hard in a Welsh mining town and no less so for the Morgan family. Seen through the eyes of the family's youngest, Huw, we learn of the family's trials and tribulations. Family patriarch Gwilym and his older sons work in the mines, dangerous and unhealthy as it is. Gwilym has greater hopes for his youngest son, but Huw has his own ideas on how to honor his father. Daughter Angharad is the most beautiful girl in the valley and is very much in love with Mr. Gruffydd, who isn't sure he can provide her the life she deserves. Times are hard and good men find themselves out of work and exploited by unseen mine owners.

Hard times came for Carraclough family and they are forced to sell their dog to the rich Duke of Rudling. However, Lassie, the dog, is unwilling to leave the young Carraclough boy and sets out on the long and dangerous journey in order to rejoin him.