 Panic spreads amongst the teachers of Cackle s Academy; they re going to have a visit from the Witch School Inspectorate, Ofwitch. The particular individual appointed to inspect Cackle s Academy is none other than Mistress Hecketty Broomhead, a tyrant of the first order and, as it happens, Miss Hardbroom s personal tutor from witch training college. An emergency plan of action is drawn up and, in order to prevent any unforeseen disasters, Mildred is banished to her room and her bats are confiscated. Sybil, who has been desperately trying to do all she can do to impress Mildred, is somewhat uneasy when Fenella and Griselda tell her where the bats are hidden. The inspection is not a success; Miss Broomhead is bent on closing down the school, particularly when she discovers the subterfuge over Mildred. Sybil, comes into her own and casts a spell on Hecketty Broomhead, which has such a drastic effect that she is forced to change her mind. Once again, the school is saved from closure.