Ming's attack on an oil platform, to capture a main computer containing the earth's entire energy network, is foiled by the Defenders, but all is not lost as he spots oceanographer Maurice Quiston using a brainwave transmission helmet to communicate with sea creatures. Ming appeals to Quiston's love of the sea world and convinces him to join forces in battling the ocean-destructive forces of modern society. With Qusiton operating out of Ice Station Earth, all the ocean's inhabitants obey his orders, joining together to attack oil tankers, undersea food farms and sewage systems all over the globe. Meanwhile the Phantom, and old friend of Quistons, finds the oceanographer's floating sea-platform vacant, while Falsh, Lothar, Jedda and Mandrake try to save the food farm from destruction. Quiston discovers that Ming has double-crossed him when the Evil One destroys his sea platform. He joins forces with the Phantom to stop the ocean life's attacks and then blows up his brainwave transmission helmet and computer in the control room of Ming's Ice Station Earth.