14-year-old Ami enters freshman year of high school knowing one thing for certain: She could be a murderer. No, she didn't kill anyone — but she could. According to the software of Capability Corp, that is, which performs a psychological evaluation on each incoming freshman student to decide how to "handle" them. 

But when she discovers that her father, who was murdered before she could know him, was killed by a member of a group that doesn't believe in the system, she's forced to decide what she believes in. 

And when she discovers that a boy who's labeled as capable of psychopathy seems to know about her father and what his beliefs were, she vows to make him trust her so she can learn the truth. 

Whatever the cost.