 Smithy is the victim of bullying in Longmarsh prison by another prisoner, Chris Hammond. Hammond wants Smithy to smuggle in a mobile phone, but when he refuses he is beaten up. When Hammond is found stabbed, CID are called in to investigate. Dan and Gina are called to a flat where the owner has returned from working abroad for three months to find someone living there. The woman claims to be having an affair with property manager Damon Pollard, and that he told her it was OK to stay there. While investigating Pollard, Jack, Mickey and Zain discover that one of the property owners has connections to Pete Larson and Carl Caplan, the man who claims he saw Smithy run Louise Larson over. Is this the breakthrough needed to get Smithy out of prison?