In a small town, a teenager named Millie Kessler experiences the typical high school drama, dealing with bullying and social pressure. Everything changes when a mysterious killer known as the "Butcher" begins to terrorize the community, leaving a trail of corpses in his wake. One night, after a deadly encounter with this dangerous criminal, Millie finds herself caught in a supernatural twist: the next day, she wakes up in the killer's body, while the "Butcher," now in Millie's body, starts unleashing his usual chaos in her school.