Directed by Christian Duguay and written by B.J. Nelson — the same team that did Scanners 2, as well as some of the same actors — this film is not related at all to that movie.
It’s also way better than that movie.
Helena Monet (Liliana Komorowska, Screamers) is a scanner who constantly deals with the horrifying side effects of those powers until her adoptive father’s experimental Eph-3 drug drowns out the voices, but also causes her to lose all of her morals. She kills that father figure, takes over his drug company and also starts to take over all of the world’s entertainment.
Meanwhile, her adopted brother and fellow scanner Alex has been raised in a monastery where he’d have no outside voices bothering him, but now he must come back to a world he doesn’t know to stop his sister.
So yeah — amazingly, the third Scanners film is not all that bad. Even more incredibly, Scanner Cop blows this away.