The Cartwrights object when a neighbor's son wants to sell his family's property to his future father-in-law, Len Keith. After all, the uncaring mine operator would ruin the region's water supply with pollution.
The Cartwrights fear pollution of their water when neighbor Tod McKaren threatens to sell his land to a miner.
Andrews and Joan survive going over the cliff and continue on to San Francisco, a psychiatrist brings Sonya Rokoff out of her trance.
Wong saves Andrews, Joan and Willy Fu from Poten's gas but Poten and Sonya Rokoff escape.
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