Laura uses her position as a nun to manipulate and seduce Jason, while simultaneously framing Zoe and other students to keep her secret safe.

The film's narrative revolves around (played by Ryan Newman/Whitney), a top student at St. Adeline’s Catholic Boarding School.

Wacko poses as a nun. A nut job obsesses about a singer student in a Catholic high school. So she pretends to be the new teacher / Bad Sister (TV Movie 2015) - IMDb