The movie Lassie is about the love of a boy and his dog. A father is forced to sell his son's dog for money to feed his family. Joe is heartbroken that his dog is gone. Lassie is also sad and is determined to find her way home. Lassie gets loose from her new owner and starts the 500 mile journey back to Joe. Along the way Lassie meet Toot who is a small dog and his owner. Lassie travels with them for a while until two snatches kidnap Tim and Toot. Toot is killed but Lassie is able to save Tim. Tim lets Lassie continue on her journey home.
After going almost 400 miles Lassies become sick from all the traveling. Lassie builds up the strength and makes it home to Joe who was also trying to figure out how to get back to her. Joe's dad is able to find a good job so he will never have to part with Lassie again.