When a man-eating cave creature appears with a fortune in uncut diamonds around his neck, Dr. Chambers' daughter Denae hires adventurers C & C Salvage to find the underground source of the gems. Accompanied by archeaological intern Andrew Paris, mineralogist Prof. Strock, and C&C's scruffy owners Cort Eastman and Eddy Colchilde, Denea's hopes of emerging from her famous father's shadow become as remote as getting out of the caves alive!

In San Francisco, Police Lieutenant Virgil Tibbs helps a group of idealistic vigilantes expose a drug ring controlled by powerful businessmen.