Comms HQ receives a distress call from a young teenager, whose friends are in dire trouble in a local river. The girls have swum out of their depth, just metres away from a dangerous weir, and cannot get back to shore. It's a race against time to prevent this fun day out from turning into a tragedy. Meanwhile, a specialist task force is planning a raid on a residential property suspected of being used as a cannabis farm.

It's 9pm, and a man phones 999, claiming his housemate is threatening to kill him and his partner. On arrival, the housemate denies the allegations, before claiming that it's actually him, not the caller, who is the victim. Telling police that the caller has cleared out his room and burnt all his belongings in the garden, the officers are now faced with a confusing situation. And when the housemate kicks off in custody and starts to flood his cell, police have to act fast to prevent an ugly situation from turning violent. Meanwhile, a specialist task force is preparing to raid a local garage suspected of being used to deal cocaine. Officers make a dramatic surprise entry, the owner is arrested, and a man is found with cocaine stashed in his shoe. After several more arrests, the suspects are taken off to custody, before sniffer dogs discover suspicious-looking powder concealed in a vehicle. But will the evidence be enough to secure a charge and keep the suspects remanded? Back at HQ, a desperate call comes in from a care worker. Her client, an elderly woman with dementia, has gone missing. Units are immediately dispatched to find her, but when it becomes clear that the woman is suffering from complex health conditions, the search to find her becomes a matter of life and death.