Vincent Austin analyses his future occupation. Some spies are made, he says, but his kind is born. He is devoted to secrecy for its own sake. His fascination with secrecy and espionage - and much else besides - is shared to an uncanny degree by Erika Lange, daughter of a post-World War German immigrant. She too has lost her mother, and she and Vincent see themselves as twin spirits, inhabiting a shared, platonic world of fantasy and ritual. At University, Vincent aims to enter Foreign Affairs - an ambition shared by his easygoing friend, Derek Bradley. However, Vincent is recruited by ASIS - Australia's overseas secret intelligence service - and his adolescent dream becomes reality. Erika becomes a journalist, eventually entering the overseas service as a press officer. She is an attractive and magnetic woman, but her emotional life is chaotic. She, Vincent and Derek meet again in 1982, when they are in their thirties, and have all been posted to the Australian Embassy in Beijing. Here, Erika and Bradley begin an affair which is ultimately doomed to fail. At the same time, Vincent attempts an espionage coup which ends in disaster for himself and Derek. Both men are expelled from China, and are based in Canberra, where Vincent is confined to the ASIS Registry: the 'memory room' of the book's title. This is the year of Star Wars, and the final phase of the Cold War. Erika, also returning to Australia, becomes a television journalist, and enjoys a period of national prominence. The fantasies of youth have become reality for Erika and Vincent, and lead to a tragic climax for them both. It is left to Derek, who inherits Vincent's diaries, to contemplate their fate.