Aunt Agatha rules her household with a rod of iron, and 131 Ballantyne Road is not a happy place until Harvey Angell comes to rent the attic He breaks all Aunt Agatha's rules and makes her laugh, but there is something mysterious about him Henry is sure he is no ordinary electrician despite his toolbox With the aid of Mr Perkins, Henry turns detective and, insolving the mystery of Harvey Angell, also solves the mystery of Aunt Agatha's past and his own