A harmless investigation turns into an epic quest across time and space.

Sarah Jane, Clyde and Rani fight across the centuries to be reunited.

Sarah Jane discovers an abandoned baby girl on her doorstep and attempts to find out who left her there. At a local nuclear power station, a beautiful woman appears out of nowhere and uses alien powers to take control of the place.

Sky has undergone a transformation and in the process has triggered a countdown that nobody is able to stop. Sarah Jane and Sky end up being trapped between the alien war fought by Metalkind and Fleshkind. Clyde and Rani attempt to prevent the biggest bang the world has ever seen.