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...

• Hopalong Cassidy Productions Inc.
• William Boyd
• Andy Clyde
• Rand Brooks
• Mary Ware
• John Parrish
• Leonard Penn
• Richard Alexander
• Francis McDonald