The Third Doctor and Sarah Jane Smith finally make it to Florana, where the Chelonian Empire is about to sign a peace treaty with humanity after centuries of conflict. The Doctor is mistaken for a member of the Earth delegation and invited to the treaty dinner between human and Chelonian dignitaries. Sarah is assumed to be the Doctor's secretary and is not allowed to attend, so she decides to go sunbathing. But her relaxation is cut short when she stumbles upon a plot by two rebel Chelonians to assassinate Big Mother, the Supreme Emperor of the Chelonians, and the conference using a terrible weapon known as "the hungry bomb".
to be added
- The story takes place at some unspecified point between TV: Death to the Daleks and TV: The Monster of Peladon.