A swarthy, good looking American named Caine (Burt Reynlds ) arrives in a small dusty hole-in-the-ground town in the Sudan after having escaped government soldiers who nearly seized him with a truckload of illegal arms. Later Cain looking for an escape from the police meets up with Anna (Silvia Pinal) and Dr. Mallare (Barry Sullivan), an ichthyologist looking for rare fish specimens. Anna convinces Caine to sign on as a deck hand. That night Cane finds out he is more then just a deck had, he is a partner as they dive for 2,000.000.00 in gold in shark-infested waters. As they dive begins and the drama grows Caine realizes he is off to an appointment with dangerous shark.