For the machinations of the mysterious Mr Eldritch are at work. A shades-wearing, bleached-blonde millionaire, he arrives at the school claiming to be its benefactor; donating computers to every student.

Investigating Eldritch is the ever-inquisitive, wise beyond her years third former Marcie, who with her fifth form friends, Reet and Thom, uncovers a plot to that doesn't just threaten the pupils of the school, but the whole human race!

With Eldritch exposed, it is hoped that things will return to normal, but Marcie, Tom and Reet arrive back at the school to find a team of blonde archaeologists digging up the playing field. But since when, as Marcie points out, have archaeologists used mechanical diggers?

It soon becomes apparent that Miss Pendragon doesn't want to uncover the past, she wants to reawaken it by summoning up the fearsome Behemoth...