By chance, eleven-year-old twins Nate and Herman Howe meet Mrs. Weatherby, a retired member of the Los Angeles branch of Witches Bureau of Investigation. The boys ask her to help find their mother, who has been missing for six months. Reluctantly, Mrs. Weatherby agrees, though all of her licenses to work magic have expired. She reaches out to her old colleagues, for information and assistance, but they soon uncover a dangerous plot that threatens the safety of the entire world. The Bureau may be compromised, so it's up to Mrs. Weatherby's band of old agents to follow the clues and keep the horrors of history from resurfacing.