After their regular babysitter cancels, the Thompson family turns to her friend, Anna to supervise their children while the parents go out to celebrate their anniversary. At first Anna seems like a dream come true to the kids, allowing them to eat extra cookies and play with things that are usually off-limits, but as her behaviour becomes increasingly odd, the kids soon find out that her intentions are dark and twisted—and she is not who she seems to be.

Inspired by a true story, Girl Fight recounts the harrowing story of a 16-year-old, stellar high school student whose life spirals downward when her former friends conspire to upload onto the Internet a shocking video of them beating her up.

After finishing law school, Ellen Plainview is looking forward to spending some much needed time with her seventeen-year-old daughter, Julie. But when Julie is charged with the murder of a teacher she was rumored to be having an affair with, Ellen stops at nothing to clear her daughter's name, even when all the evidence seems to point to Julie’s guilt.