 The landlady & sweets shop keeper Madam Jeanne shows her customary nearly blind confidence in an apparently affluent, charming regular customer, but is soon to find out, as Mr. Krueger is watched by the BOB (hence the title- a Dutch abbreviation for a former Belgian paramilitary police detective branch), he s not in regular business as he made her believe, but stealing diamonds (from the villas of clients who pay him to watch their villas) which he leaves in one of her chocolate boxes, just when the student-tenants were grumbling the boarding diet has been set on rabbit food out of  solidarity  with eternally fat handyman Odilon...