The world has finally managed to blow itself up and only Australia has been spared from nuclear destruction and a gigantic wave of radiation is floating in on the breezes. One American sub located in the Pacific has survived and is met with disdain by the Australians. The calculations of Australia's most renowned scientist says the country is doomed. However, one of his rivals says that he is wrong. He believes that a 1000 people can be relocated to the northern hemisphere, where his assumptions indicate the radiation levels may be lower. The American Captain is asked to take a mission to the north to determine which scientist is right.

After capturing Claw, all the criminals have gone into hiding. Until Claw escapes! Gadget thinks he will get the case, but everyone else has other plans. A new version of the Gadget project is unveiled in the form of G2. Strict orders are given for Gadget to stay away from G2 and every crime scene, but Gadget feels he is needed more than anyone.

Round the Twist is a Logie Award-winning Australian children's television series about three children and their father who live in a lighthouse and become involved in many bizarre magical adventures.