A Diabolic is ruthless. A Diabolic is powerful. A Diabolic has a single task: Kill in order to protect. Nemisis is a Diabolic. Created to protect a galactic Senator's daughter, Sidonia. The girl who is as much as sister as a master. There's nothing Nemesis wouldn't do to keep her safe. But when the power-mad Emperor summons Sidonia to the galactic court as a hostage, there is only one way for Nemesis to protect her... she must become her; hiding her true abilities and pretending to be human. As the Empire begins to fracture and rebellion looms closer, Nemesis learns there is something stronger than her deadly force: the one thing she has been told she doesn't have - humanity. And, amdist all the danger, action and intrigue, that might be the only thing that can save her, Sidonia and the entire Empire.