Miss Mary Meadows is a young woman who works as a substitute first-grade elementary school teacher who enjoys taking long walks in her suburban neighborhood, wearing traditional clothing and tap-dancing shoes. Unknown to everyone, she is a secret vigilante who kills local thugs who accost her or when she witnesses them committing crimes. She always carries a small semi-automatic pistol in her purse and speaks in a childlike, innocent manner. She lives by herself in a small house and talks occasionally with her mother over the telephone about what she did during the day.