After the Master's TARDIS returns his remains to Gallifrey, in accordance with his final wishes, an intricate plot begins to change the nature of the universe forever. But even in death the Master threatens life.
As the Master infiltrates the Kaled scientific elite, the Time Lords seek to counter his interference. But while Narvin and President Livia try to stabilize the past, a new and horrifying future dawns in the wastelands of ancient Skaro.
With all known history threatened, the Daleks take desperate action to preserve their established legacy. When they cross dimensions to recruit an alternative incarnation of the Master, an uneasy alliance is formed.