An electrical storm causes an explosion and fire on an offshore oil-drilling platform. Carter Primus must rescue a colleague who is trapped in the raging inferno.
Primus is commissioned to guard a museum filled with priceless treasures. The museum is located near the sea and while Primus and his assistant attempt to install infrared devices underwater, they are trapped by a steel net.
When Primus develops a sophisticated robot to complete a risky underwater operation, little does he realize that George Benton has other plans for the robot-namely to recover Russian art treasures from a sunken liner.
Primus is dogged by a sniper while he helps a community whose important economic resource, a phosphate plant, is also its greatest liability, the deadliest cause of pollution, killing all fish in the town's river.
Nicola, a photographic model, and a woman's-lib advocate is determined to attempt a dangerous dive. Nicola steals an untested underwater breathing device that has been altered and is lethal if used.
Drama involving an impending hurricane. While training dry land miners to dig on the ocean Primus discovers that two miners searching for ore samples are missing.
The police chase a gang involved in the plutonium black market. Primus replaces one of the gang members, a Navy diver, after the guy is washed away dead on the beach.