Cassie Hack was an ordinary outcast high school nerdgirl until her mother, Delilah, was discovered to be a serial killer (dubbed "The Lunch Lady") who had been murdering the students who had been bullying her daughter. Even worse, after she killed herself she came back from the grave as a "slasher": an undead serial murderer powered by hate and rage and existing only to carry on killing. To make things even worse, Cassie ended up having to personally re-kill her by shooting her several times in the face.