A Chinese-American woman hires Perry Mason to locate a valuable collection of diamonds missing from her grandfather's Hong Kong residence.
Arch-criminal Tiffauges has been run out of New Orleans and is passing through North Fork with his entourage. Spotting the McCain ranch, he decides it would make a ranch for himself and tells McCain he wants to buy it. When Lucas says it's not for sale, Tiffaughes threatens harm to Mark unless he gets the ranch.
Jennifer Beale is abducted in the hopes her rich father, Joshua, the richest silver baron on the Comstock, will pay a $1M ransom. The plan unravels when the beautiful Della is killed and Hercules, who loves her, finds out who did it.
A shepherd ignores the Cartwrights' warning not to drive his flock across the Ponderosa; guest Everett Sloane.
In defending a young man charged with murder, a female lawyer friend of Perry's simultaneously clears her dead husband's name of suspicion and helps her client take the first step toward redemption.