A South African engineer is appointed general manager of a gold mine, and exposes a conspiracy to boost the price of the ore by drilling into an underground lake beneath where the company is digging, causing a devastating flood. Action adventure based on a novel by Wilbur Smith, starring Roger Moore, Susannah York, Ray Milland, Bradford Dillman and John Gielgud.

Rod Slater is the newly appointed general manager of the Sonderditch gold mine, but he stumbles across an ingenious plot to flood the mine, by drilling into an underground lake, so the unscrupulous owners can make a killing in the international gold market.