Rupert Brown can tell from day one that Miss Switch is no ordinary fifth-grade teacher. Her whole look is about as comfortable as a steel knitting needle! Plus, she's in some serious trouble. It seems that Miss Switch has been condemned by a crazy contraption called a computowitch, and she must come up with some original witchcraft -- or she will be doomed to sweep Witch's Mountain for l50 years.

Can great scientist Rupert Brown and his friend Amelia Daley face the computowitch and the Witches' Council -- and get their favorite teacher of all time out of this mess?