Doctor Who fan fiction.
Traces the dissolution of the Traken Union, an empire of planets all kept in a state of peace and harmony by the presence of the Keeper of Traken. The Traken Union was introduced in the 1981 Doctor Who serial 'The Keeper of Traken'. Though this story doesn't involve the Doctor himself, it takes place not long after the events of that original serial, judging from the references to the Doctor's Traken companion Nyssa, her father Tremas, and Luvic, who assumed the Keeper's position at the end of the serial.