A World War II European orphan, Paul, has lost all faith in humanity. Brought to the United States by Father Mathew, Paul's confidence and faith are gradually restored through his close association with a dog, Rin-Tin-Tin.

Foxes are mysteriously disappearing from fox farms and Agent Don has been sent to investigate. Brad and Pete are the culprits and they are using a dog that can climb the security fence to steal the foxes. Don brings a dog with him and when Carol sees a dog stealing a fox, she accuses Don.