Harry, Bethany and Abigail continue their training to become Recruits under the not very watchful eyes of their mentor Mrs Suo Regnad (Arbiter Third Tier) who changes her accent as often as she changes her name. The three have been chosen by the Guardians to keep the Spirit Gateways safe as if they are destroyed the natural world will not regenerate. This time Mr Hobson (Arbiter First Tier) arranges a student exchange for the three to a famous public school, Elvingsborough College in order that they can recapture Festulantus, an evil fallen Guardian now living in nearby Diablerie Castle. . Festulantus has found a way of extracting evil from wicked people and transferring it to other, who under his influence, will carry out criminal acts which benefit him and which also cause environmental disasters. Harry, Abigail and Bethany with the help of some unsuspecting friends must frustrate his plans.