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.
| Actor | Role |
|---|---|
| RRin-Tin-Tin IIIRin Tin Tin | Rin Tin Tin |
 Donald WoodsFather Matthew | Father Matthew |
 Robert BlakePaul the Refugee Lad | Paul the Refugee Lad |
 Claudia DrakeMrs. Graham | Mrs. Graham |
 Steve PendletonGordon Melrose | Gordon Melrose |
 Earle HodginsJoe - The Dog Handler | Joe - The Dog Handler |