Carly Gregg is a good student but has had trouble at school. She briefly attends an alternative school after being caught with a knife. Her parents revoke her phone privileges after she breaks their social media rules. Friends grow concerned when they discover Carly has a burner phone and catch her smoking marijuana.

One friend distracts Carly while another informs her mother. Ashley Smylie confronts Carly after school, warning her that her room will be searched when they get home.

Ashley heads to Carly's room while Carly takes the dogs out. Almost immediately, Ashley finds a box of THC vape pens. She takes the box to her bedroom before returning to continue the search. Carly comes back inside, checks on her mother's location, and quietly heads to her parents' room. She lifts the mattress and retrieves her mother's .357 Magnum pistol.

Immediately after the shooting, Carly uses her mother's phone to text Heath Smylie, "You almost home honey?" Smylie replies that he'll be home in about an hour. Carly then texts six friends, saying she has an emergency and needs someone to come over. One friend offers to call 911, but Carly declines.

Eventually, a friend agrees to come. When Carly answers the door, she asks the girl, "Are you squeamish around dead bodies?" and then leads her to her mother's body in the bedroom.

Carly tells her shocked friend, "I put three in my mom, and I have three more waiting for my stepdad when he gets home." She says he'll arrive soon and asks the friend to wait in the backyard. Carly opens the garage door, goes back inside, and waits for Heath Smylie. The moment he opens the door, Carly fires at him. Smylie grabs the gun, and Carly fires two more shots during their struggle.

Smylie overpowers her, and Carly runs through the backyard, fleeing the home.