 Zak Walker is once again late for school and Head of English, Grantly Budgen has had enough of his tardiness. He confides in Andrew that he thinks Zak s problem could be drug related. But when Zak does a runner from detention, Andrew and Kim are forced to look into the matter. Could he really be an addict? Chlo is sticking to the pact she made with Donte. She insists that she was driving on the night of the crash, and what s more, she s going to tell the police. But neither the police nor Izzie believe her, so Chlo has to resort to desperate measures in order to convince everyone that she s serious.