The return of Rin Tin Tin stars Donald Woods as an American priest assigned to a postwar European mission. Bobby Blake is a young war orphan whose harrowing experiences have soured him on mankind. Father Woods brings the boy to America, but the lad is still unapproachable until he befriends Rin Tin Tin. The dog restores the boy's zest for living and faith in humanity. A villain threatens to take the dog away.
Based on an original idea by William Stephens.