On the far side of a break in the fabric of space is the planet Zamper, home of a secretive organisation that constructs and sells the mightiest warships in the galaxy. It is to Zamper that the last warriors of the fallen Chelonian Empire have come in a final attempt to restore their race’s glory. Separated from the TARDIS, the Doctor and his companions are intrigued by the bizarre operations on Zamper. Why are accidents and power failures afflicting the planet? What is the true agenda of the mysterious Management? And what are the strange powers of the alien shipbuilders?