Ruined crops force Charles and his family to leave Walnut Grove and try their luck in the gold camps.
Boss Hogg (Sorrell Booke) has some crooks steal the Christmas trees that the Duke boys (Tom Wopat and John Schneider) are delivering, and he almost loses the money in his safe.
A mysterious woman wants her slain father's South African diamond mine freed from unscrupulous businessmen.
Hunter and McCall investigate a mobster's son who kills an undercover officer, unaware the cop is his half-brother.
Rosco (James Best) and Boss (Sorrell Booke) are involved in an insurance fraud that almost backfires until the Duke boys take charge of the investigation.