Six months have past since the incarceration of Arty Granger, the most malicious tooth fairy in the world of Mirvellon. In the dark depths of his prison in Mursham Marshes he has plenty of time to plan his revenge.

And closer to home, Gertie Cruet has not forgotten her humiliation at the hands of Aggie Lichen and her friends. She wants justice now!

Aggie's family win the monthly raffle. A curious first prize - a month with Stan and Alf Trolitt. Orphan twins who love to tidy everything up. Orphan twins with a strange secret. Aggie's tolerance level is fast decreasing as she now has to drag both the twins and Myrtle out to collect teeth on the `other side'.

While out collecting, Aggie's friends notice that `wanted' posters for an escaped prisoner appear on windows. The picture seems familiar but they know Arty is still in prison. Then Myrtle disappears ...