Amidst royal intrigue and military escalation, in a place far from Earth and a time thirty
years after a princess and heir to the throne vanished along with the citadel where she
lived, the disappearance still occupies the minds of an ensemble of people, One of that
ensemble, Diem Huong, was a girl when the citadel stole her mother away, but now Diem Huong
is an engineer on a project which is determined to travel back those thirty years.
Mother had gone on ahead, Ancesters only knew where. So there was no way forward. But
somewhere in the starlit hours of the past—somewhere in the days when the Citadel still
existed, and Bright Princess Ngoc Minh’s quarrel with the empress was still fresh and
raw—Mother was still alive.