Real-time documentary following police officers on duty between 9pm and 10pm. The first episode sees officers responding to a car driving into someone's garden, a woman who claims to have taken an overdose, and a distressed mother who has been attacked by her daughter. Elsewhere, an undercover prepares to bring a prostitution ring to justice, and an investigation crossing county lines requires detectives to contact the crown prosecution service and try and demonstrate they have enough evidence to convict their suspects