Hoppy, California and Lucky arrive at a remote inn, where Lucky expects to be married - but finds the bride-to-be in distress over her uncle, who has suddenly disappeared from the inn. Then Hoppy finds the uncle's body in the shaft of his nearby mine...
William Boyd
as Hopalong Cassidy
Andy Clyde
as California Carlson
Rand Brooks
as Lucky Jenkins
Mary Ware
as Mary Benton
John Parrish
as Jeff Potter
Leonard Penn
as Earl Wesson
Richard Alexander
as Duke
Francis McDonald
as Bart Lansing
Bob Gabriel
as Larry Potter
Forbes Murray
as Sheriff Tompson
Stanley Andrews
as Jesse Williams
Don Haggerty
as Deputy Sheriff