Thunderstone is an Australian science fiction television series produced by Jonathan M. Shiff Productions set in a post-apocalyptic world after Earth is hit by a comet.

The main character Noah Daniels, his family and other survivors who live in an underground colony called North Col in the year 2020.

It is impossible to live on the planet's surface, because of the extreme cold and constant snow storms caused by the impact of a comet known as Nemesis.

This causes a chain of events that reveal the true identity of the Shadow Master, and his goal to acquire enough thunderstone to become immortal.

Noah and company devise a plot to destroy the core of the Nemesis Comet which was recently discovered by the Shadow Master, to prevent him from gaining absolute control over Haven.

In this season, the plot revolves around acquiring a large Thunderstone Cube, which Noah learns about from fugitives from the future, named Mayah and her brothers, who brought it there under a lake.

After obtaining it, Noah realises he could travel back in time and use its power to destroy the Nemesis Comet completely, preventing the apocalypse.