DS Helen Ash finds herself torn between work and home when she's put in charge of a large-scale stake-out operation to catch a gang of armed robbers. It's an important assignment, but Helen's husband David, who's also a police officer, is doing everything he can to make her job harder. He's jealous of her position as a detective sergeant in the Flying Squad while he's only a constable, he wants her to transfer out of the Squad, but she lives for her job and she can't let go. When David refuses to look after their children, Helen has to leave her observation point to go home. But where does that leave the rest of her team?A serious of violent robberies prompts the Armed Robbery Squad to launch a he-tech surveillance operation on the suspect, Gil Rogers. However, he uses his army training to stay ahead of the squad – until Ash makes a shocking discovery.