The Roman occupants of Renfordium left behind some buried treasure, which has been sought ever since. Eddie has inherited part of a map from his grandfather, but Basil Stoker has its other half. They each try unsuccessfully to find the treasure with their half, and end up having to collaborate. Ben discovers a chronicle of an ancient ""foot-bladder"" match played between the Rejectii and the Razorii, to settle the question of who should inhabit the Renfordium area.