A fraudulent astrologer named Martin Trueman is hit by an extraterrestrial body and begins to impress everyone with his uncanny predictions. However, what he predicts for Sarah Jane is far from pleasant...

Clyde threatens Sarah but they manage to talk him out of it, which leads Sarah Jane to believe that Trueman's control on people can be repressed by persuading them to do something that they do not normally want to do. Meanwhile, using in his broadcast to the world, Martin Trueman takes over each star sign one by one, starting with Gemini - including Rani's mother. The world is in confusion as people are accepting the 'Ancient Lights'.