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Jimmi is visiting an elderly patient called Jack who has recently has a knee operation. As Jimmi starts packing up his equipment to leave, he overhears Jack talking to someone called Izobel. Jack explains that he used to be prank-called by teenagers, but now they call his phone for advice and just to have someone to listen to their problems. However, Jack doesn’t realise that the time he is taking to talk to Izobel will result in keeping a young teen safe from danger…