Mobeen and Nate are just weeks from the end of their sentence, but Mobeen’s work as one of the prison’s 'listeners' gets him into trouble with a terrifying inmate from another wing - a man known simply as Megalodon. Megalodon is determined to get a transfer to Mobeen’s wing so he can confront him about meddling in his business.

Megalodon is now on Mobeen’s wing, and Mobeen must avoid him at all costs – which means trying not to leave his cell. Harper instantly makes Mobeen leave the cell to go and see Dr Nida. Nida now has Aqsa working alongside her, and has even managed to secure her an international placement in the UAE. But despite avoiding Megalodon, Harper and Mobeen fail to get any more information about Memory Stick.

Megalodon throws the prison into a full-blown riot. Mobeen, Nate and Harper split off into different groups. Mobeen is concerned with Dr Nida’s safety, while also keen to keep Memory Stick on side. Uncle Shady ends up with Memory Stick, with both of them desperately trying to evade Megalodon and a wing full of rioting inmates.