Drugs cop Rhino, who knows everyone on his patch in Merthyr Tydfil, is dealing with a big case. When three lads rob a post office in a quiet village 15 miles away, it is down to him to identify the culprits using his local knowledge. On the Gurnos Estate, response officer Louise is given the run-around by a 24-year-old who has been arrested almost 50 times and is not being entirely straight with his story.