The story of a boy, a dog, and a man. The boy discovers he is heir to a shipping line, and travels to Los Angeles, accompanied by inventor/radio operator Bob Whitlock and Irene Blaine. Their journey is aided by Pal, a wolf dog.
Rin-Tin-Tin Jr.
as Pal
Frankie Darro
as Frank Courtney
Boots Mallory
as Irene Courtney
George J. Lewis
as Bob Whitlock
Henry B. Walthall
as Jim Courtney
Hale Hamilton
as Norman Bryan
Fred Kohler
as Joe Stevens
Niles Welch
as Mason
Gordon De Main
as Murphy
Yakima Canutt
as Bill
Cornelius Keefe
as Jerry Patton
Tom London
as Brooks