Mr and Mrs Sheridan, parents of Isobel, a university student studying Art History, ask Ken to investigate why their daughter has changed and why she suddenly seems to be suspiciously wealthy. Ken talks to her former boyfriend, Geoff, and learns that she used to be very keen on rowing but then suddenly gave it up a year ago and now has a new set of friends.Laura and Rocky go undercover, posing as students. They see Isobel and a friend, Dominique, all dolled-up and getting into a brand new flashy convertible. They follow her to a hotel. When Rocky sees the women leaving a hotel bedroom after a little while, and an Italian man gratefully handing over money, he jumps to the obvious conclusion - that they are on the game! Then, outside Isobel's room, Laura finds syringes and a note referring to poppies - perhaps she is a drug dealer. What should Ken tell her parents?Ken eventually discovers that Isobel is selling her essays to less able students - with the knowledge of her tutor, Dr Micha