Not Exactly Human

Olivia lived her whole life as an only child. Until the day when she's kidnapped. Olivia discovers she not only has a sister, but a twin sister with a BIG secret.
Madison has barely lived her life since she has been on the run. She is a hard to handle 'I'm- a- bitch- but- it- helps- me-survive' kind of girl.
Suddenly Olivia's world isn't so perfect anymore and Madison's already hectic life is just a little crazier. You know, 'cause Maddie's a mutant.