Rox is ordered to investigate why one after one, several food factories must close down after health inspector by Buik's team. Rick's tests prove the food isn't contaminated, so the test kits themselves must be doctored, but the fiendish assistant inspector realizes Xavier is on to him. Meanwhile at home, the housekeeper is the only left to receive a local journalist who is to write an article on Xavier after his third consecutive regional marathon victory.
In veel fabrieken is het eten besmet met een levensgevaarlijke bacterie. De zaak is een beetje verdacht, want het probleem werd overal gevonden door dezelfde voedselinspecteur. Team ROX gaat undercover om die inspecteur in het oog te houden.
