The story of this book is about three children who named William, Susie, and Martha.After they have finished mixing the ingredients, suddenly the three children feel a strong cold wind and the brew start to smell bad, the children saw Miss Hepplewhite in front door.Miss Hepplewhite realized what the children did and told them that this brew could be a little danger because a long time ago in that place Morgan le Fay king Arthur's sister and a kind of witch life there and with that brew the children awakened the soul of this woman.Start with a straw appears in the barn, Susie's burned cake, and the children's TV doesn't work.Then, one day the children went and climbed up the hill, where the whispering knights were.Actually the barn was one of Morgan places.