A Diabolic is ruthless. A Diabolic is powerful. A Diabolic has a single task: kill in order to protect the person you've been created for. Nemesis is a Diabolic, a humanoid teenager created to protect a galactic senator's daughter, Sidonia. When the power-mad Emperor summons Sidonia to court, to serve as a hostage, there is only one way for Nemesis to protect Sidonia; she must become her.