Jen's father has inherited an estate from his Great-Uncle Thaddeus and they are moving into the old, castle-like house on the property. Jen is thrilled; she can feel the strange vibes coming from the castle and knows something out of the ordinary is going to happen. When, against her father's wishes, Jen goes up the tower in the back yard, she finds a beautiful glass globe with a spout on the end and takes it back to her room, knowing instinctively that it is special. Odd things begin to happen. Dad has a girl friend, Moura, who Jen can tell does not love her Dad. Jen's cat breaks the globe, and Jen meets a girl in the woods who says she was trapped in the globe and was released when it was broken. Together Jen and Kieryn must defeat HER and save her brother and aunties, who are also trapped. Can Jen rescue them? And can she do it in time to prevent her father from marrying Moura?
Witch Catcher tells of the struggle between a girl and a witch, good and bad, young and old. Mary Downing Hahn's story is both creative and fantastic as it describes the dangers and fears of a young girl and her attempt to save her father from something that he doesn't want to be saved from. This is a story that will fuel the imagination of the young and the young at heart.