Hidden Kingdom

Three members of one family have finally discovered a habitable planet after another of many voyages checking out identified possible worlds. The process requires numerous criteria to be met. The three were contemplating the necessary process of environmental transformation into a biosphere when evacuated by the intrusion of an unknown craft.
Marlo, the eldest and leader of the expedition, is conflicted by the imposition of a Galactic Union officer into his life. Tam, the officer, is initially suspicious about the mysterious man who won’t divulge his home planet or his purpose piloting a spacecraft which has dubious origins. She becomes curious and her curiosity somehow entangles them both in a web of intrigue and the life threatening machinations of a treacherous uprising by the Bara Alliance.
Not only does Tam breach the secret isolation of the hidden kingdom but she becomes aware of a world of secrets. Marlo contravenes kingdom conventions while trying to maintain his own hidden agenda. How do these two manage to work together when they appear to distrust each other’s motives?