Twelve-year-old Joe Carraclough is heartbroken. Lassie, the family's beloved collie, must be sold to the Duke of Rudling, a bad-tempered, wealthy old man. The Carracloughs are struggling through hard times and can't afford to keep Lassie, who is without a doubt the finest collie...
A collie undertakes a thousand-mile journey in order to once again meet her former master at the school gate.