Follow-on to the Operation: Revival crossover series - Faced with annihilation the Homeworld Clans are forced to accept the unthinkable. Star Captain Greta Lankenau, refusing to leave her beleaguered Clansmen behind embarks on a suicide mission little-knowing that it will take her somewhere she never thought possible...

The final installment: The real enemy has been revealed. As the Doctor faces one of the greatest challenges of his life, so too does Vlad Ward of Clan Wolf. Either choice will irrevocably change Clan Wolf forever; he must either betray his people or his mentor. The Doctor's final battle is drawing near and with it rests the fate of the universe...

The Guardian of Legacies resides on Terra, seemingly doing the bidding of the Clans. Meanwhile, Justin Allard and the Doctor are being held by Clan Wolf and when Vlad Ward presents the Time Lord to his Khan, Ulric Kerensky, the Doctor begins to suspect that the earth is facing a far greater threat than anyone first thought...

The Inner Sphere - thousands of star systems comprising vast interstellar Empires - is at the mercy of the invading Clans. On New Avalon, Hanse Davion and Justin Allard try to formulate a plan to defeat the Clans, but the arrival of a strange blue box interrupts them. On Terra, the Clans, under ilKhan Leo Showers, eagerly awaits the arrival of the Guardian of Legacies...