Harry has an ulterior motive in treating the gang to a trip to Hawaii. He wants to to excavate the side of a volcano in search of diamonds. But the volcano might not be as extinct as he thought.

When drought strikes a farm belonging to Harry's aunt and uncle in Arkansas, the Salvage team goes up in an old biplane to try to harvest rain from the clouds using a new method involving heating the air above them.

Skip convinces Harry to buy a race horse based on computer projections that it will be a winner, but when the horse breaks a leg in its first race, they try a high-tech solution using a NASA laser technique to mend the break.

Learning that a herd of wild horses are to be slaughtered as part of a government program to control their numbers, the Salvage team tries to round them up and sell them to a local police department that can use them for mounted patrols.

Part Two. Harry and his salvage team risk their lives in an attempt to change the course of an iceberg headed on a collision course with San Francisco's shipping traffic.

A rival salvage company's attempt to tow an iceberg results in disaster.