The Martin kids learn of a magic spell that will take them to the 'mommy market' so they can get a more user friendly model. After giving a few other moms a try, they want their own back. But that is not so easy.

Vada Sultenfuss is obsessed with death. Her mother is dead, and her father runs a funeral parlor. She is also in love with her English teacher, and joins a poetry class over the summer just to impress him. Thomas J., her best friend, is "allergic to everything", and sticks with Vada despite her hangups. When Vada's father hires Shelly, and begins to fall for her, things take a turn to the worse...