Tour guide, emissary, diplomat, thief — and a long-lived, genetically engineered Synth — Brianna Rei travels the Hundred Worlds, hiding in plain sight. She knows her survival depends on staying one step ahead of the bounty hunters who have nearly exterminated her kind.

All that changes when she teams up with fellow-thief, Jerrold McKell, and he discovers Brianna's true identity. Now Brianna must choose between trust and survival, and what it means to be truly human.