Zoe is a high school girl facing graduation while still reeling from her mother’s death. In her spare time, she goes hunting with her ex-special forces father, Todd (Thomas Jane), and hangs out with her friend, Lewis. Unfortunately for Zoe, on a regular school day, four armed assailants lay siege to her high school, crashing into the cafeteria with a van, killing several students and taking even more hostage. Now, Zoe needs to use her wits and survival skills to fight for her life, and those of her classmates, against a group of live-streaming school shooters.