A blond teen is tied into a chair and another person pours gasoline around her and lights a lighter.We get a lengthy cheerleading routine. A new girl, Riley, is shown around by Blaire and takes a special interest in the cheerleading squad and rock music. Riley meets a guy with greasy hair named Connor and makes frenemies named Dee at Cheerleading tryouts.Riley is embarrassed when Denise Richards (her step mom) shows up at school and invites her to froyo. Later at dinner, Riley's father encourages his daughter to give their new town a chance. (Riley wants to go back to Chicago and blames Denise Richards to moving the family.) After a fatherly pep talk, Riley agrees to give it a shot; things might not be that bad if she makes the cheer squad. Denise Richards listens to the conversation.Denise Richards shows up at cheerleading tryouts and awkwardly gives the thumbs up to Riley. Then she tries to convince the coach to put her stepdaughter on the team, but Riley is sub-par to an all-start athlete Dee. Denise Richards plots her next move over wine and ignores a text from her therapist.Riley is mortified when her stepmother joins the PTA. Denise Richards spends a lot of the movie peeking around corners. With access to the school during a bake sale, Denise Richards messes with Dee's medical paperwork. It doesn't work.Riley continues to flirt with Connor, who also happens to be her lab partner, and smashes a strawberry in science class. Then in the car on the way home, Riley opens up to Denise Richards about there being only one spot on the team up for grabs since Dee is a lock. Denise Richards takes care of that and plants drugs on a girl named Ariel. She is kicked off the squad.Denise Richards visits her therapist and insists on getting her files back. While the doctor goes to the next room to get print outs, she steals a prescription form from the doctors desk. She plants steroid drugs on a girl named Ariel. She is kicked off the squad. Then she does some more eavesdropping. (Like practically standing at Riley's door while she was talking with a classmate.)Denise Richards doubles down on the sabotage, This time doing heavy tech work. Digitally swapping out the faces of two cheerleaders, Tiana and Ariel, to make it look like they are drinking in uniform. They too are suspended from the team.Denise Richards opens up to Riley about a past relationship. She was engaged to a man named Tim, who killed himself. Denise Richards finds ways to make her character sympathetic even though she is behaving badly. Riley and her stepmom seem to be growing closer. Riley gets a ride back to her house from Chloe (who is the cheerleader captain as well as Connor's sister). She is being invited by Denise to have a smoothie, and while talking Chole says she's sure that she can get the suspended team mates back.Chloe gets into an accident (brake failure) while chugging smoothie and ends up in a coma. Connor and Riley cuddle in the hospital lobby until a detective accuses Riley of sabotaging Chloe's car brakes to get a spot on the team. Word gets around, and the whole school agrees. While sitting outside, Riley notices a puddle of liquid on the driveway and finds out that it is brake fluid from Chole's car. She then realizes that it is her stepmom who's behind all this.Riley asks her BFF to drive with her to Chicago. But she says she cannot as she has a class in the evening. Riley convinces Connor to go with her instead. They drive to Chicago to talk to Tim's ex-wife, Sarah. The woman tells them that Tim died in a car accident but the car that was meant for her. Denise Richards was going by the name "Malory." and is dangerous.When she gets home, Riley tries to tell her father, who thinks she is joking and tells her that she is overreacting. When he tells Denise Richards, she speculates that Riley is probably on drugs. Then she stands over Riley's bed in the middle of the night and threatens her.Connor and Blaire help Riley try to help catch Denise Richards in her lies. When step mom goes out for a jog, Connor and Riley hack into the GPS of her car and finds Denise Richard's therapist. The therapist refuses to talk to the kids, but it doesn't matter because Denise Richards knocks them out in the parking lot in broad daylight.The dad finally realizes something is up and works with Blaire to track down Riley with a website called "Find Your Friends."Denise Richards dumps gasoline all over Riley as she tells her that she is bad at cheerleading. As Denise lights up the lighter and is about to set her ablaze, Riley unties herself and the women roll around the ground trying to strangle one another. The father arrives just in time to scare Denise Richards away. She drives through the woods and is stopped by the police, who were alerted by Blaire.Riley tries out for and makes it onto the team. She is happy to put her ex-stepmom, Denise Richards behind her. (thanks to lifetimeuncorked)