Alfie and Angel Young return to Parkway Grange for the holidays. The last time they saw Mylor, he had had a terrible accident. Had the Professor been able to restore the magnificent, lifelike electronic horse? Would he be the same? Luckily, Mylor is as perfect as ever, but almost everything else isn't Parkway Grange, the beautiful maze-surrounded home of the Professor and Boff, is to be demolished and replaced by high-rise flats unless 100,000 can be raised. Glen Striker, a sinister and cruel neighbour, constantly turns up at the oddest places and clearly has plans for Mylor. Angel, Alfie and Boff's new friendship with Davina and Prince Aziz seems threatened by the fact that Davina's father is the man who wants to bulldoze Parkway Grange. Trouble follows trouble when Mylor disappears. There are threats, fights, and a kidnapping, all building towards an action-packed climax at a tournament