The Hotspot Mining Complex, situated at the North Pole, is responsible for producing from the only existing natural source, commercial quantities of tritonium alloy, which is being used for constructing the nose casings for a rocket. General Rebus, the commander-in-chief of the Space Administration, is hoping to send the rocket to Mars, presumably to perform in-depth research assignments regarding the Mysterons.

Captains Scarlet and Blue travel to the North Pole to act as security supervisors, in the inevitable time that the Mysterons may strike upon the complex, which they do when they take control over a maintenance engineer and instruct him to disconnect the massively high voltage current power lines between the booster power station and the tower.

The 100,000 volt current is crucially-needed, as the heating rods located under the tower keeping the below-freezing ice at bay, and when the current is distorted, the ice will surround the tower, slowly but surely crushing the structure