 The Media Room is burgled: lots of valuable equipment is missing, evidently by someone who knew there way around the school. Gabriel is in no doubt who did it, and tells Mick and Barry that the equipment was probably marked with invisible dye. Natalie brings in her saxophone, and asks her sister, Becky, to store it in her locker, because she s forgot her key. Becky also finds her key missing, and asks Nick to do it - he agrees thinking she meant it was a favour for Natasha. Maria, Justine, and Natalie hound Mr. Brisley to support their petition for fairer school rules. He won t sign, but advises them to go to the school council. Later in the day, Natalie asks for her sax back, and she in turn asks Nick for it - but then realizing she meant Natalie not Natasha, he gives her the locker key. When she opens the locker, she finds to her horror photocopied sheets of Natasha s diary! Later, at home Becky reads some of the diary contents, and finds her sister writing about how weak she thinks Becky is. Becky confides in Natalie, but won t tell where she found the diary - not until she has a chance of sorting it out herself. Mrs. Keele finds a classroom in an utter mess - Mr. Parrot admits his lesson was out of control, but wants to handle the situation in his own way. Becky confronts Nick when he s with Natasha - Natasha is only too happy to part company with Nick. Nick finally admits he s been putting up the diary photocopies, and Becky works out that he did it so that Natasha would be enemies with everyone except Nick. She agrees not to expose him, but in return he s got to stop posting the diary. Natalie works out what s upsetting Becky, and tries to get into Nick s locker. Mr. Robson catches her, and she can t explain her action, but Nick supports her vague explanation. When Mr. Robson s gone, she demands to have the diary photocopies off of him: she says that s the end of the matter, but there s another person listening from behind the lockers - Fran. In the next lesson, Fran wastes no time in grabbing the sheets, and posts up one on the noticeboard. Maria and Natalie decide enough is enough... Maria pulls out the remainder of the diary photocopies from Fran s bag - Fran admits she did post the recent ones, but only those...