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.
For Nemesis, that person is Sidonia, heir to the galactic Senate. But when the power-mad Emperor summons Sidonia to the Imperial Court as a hostage, there is only one way for Nemesis to protect Sidonia: she must become her.
Now one of the galaxy's most dangerous weapons is masquerading amidst politicians and two-faced Senators' children, and Nemesis must find within herself the one thing she's been told she doesn't have - humanity. With the Empire beginning to fracture and rebellion looming, that could be the one thing that saves her and the Empire itself.