When her interests are threatened by unprincipled rivals, a Canadian lumber heiress (Sheila Bromley) wires her uncle in Britain for help. What happens, however, when the uncle's treacherous aide comes to town, seeking to claim her timberlands as his own? It's up to Rin Tin Tin, Jr. and his Mountie handlers to sniff out the truth! Edgar Edwards, James McGrath, Jameson Thomas also star. 56 min. Standard; Soundtrack: English Dolby Digital mono.