Holby City spin-off which concentrates on the challenges facing the police officers and CID unit of Holby South; challenges that are very different from those facing the traditional bobby on the beat. Hard drugs, even harder gang members, and the constant threat of terrorism all combine to prove that modern-day policing isn't just about robberies and ASBOs. Despite being weighed down by never ending bureaucracy, the officers of Holby South aspire to be the best, putting their personal opinions and passions to one side in order to make Holby a safer place to live. Despite his professional heroics, DI John Keenan has to face facts about his marriage, while probationer Lucy Slater has a baptism of fire at Holby South.