The cases & adventures of tough Sergeant John Mann, officer of Her Majesty's Royal Military Police Special Investigation Branch.
Mann's investigation of a soldier going AWOL uncovers a sexual attack on an officer's wife, and that officer's inexplicable reluctance to do anything about it.
In West Berlin, a British solder has injured a call girl, and rather than face charges, defects to the East Germans. To spare the soldier's wife, Mann goes "Over The Wall" too in an attempt to bring him back.
In Aden, a tough Sargent badly beats a native boy,enough to hospitalize him. Mann is sent to look into it, but midway through the investigation, the Sargent meets with a deadly accident.
Mann is asked to make an independent inquiry into the case of a soldier who has confessed to robbery. Despite the soldier's insistence, Mann is led to believe that he is innocent.
Mann is sent to Cyprus to investigate a serving soldier who has gone AWOL with three Sterling sub-machine guns and six magazines of ammo.
New Year's Eve: An unpopular and weak-willed officer of the 1st Kings Own Lancers is browbeaten by a wily NCO into driving him to a party. On returning to the base, both drunk, they smash into a wall.
Returning a deserter to a regiment that has recently returned from Borneo, Mann is concerned when he is told that his prisoner's dementia is due to the soldiers being haunted by a ghost.
At a base where boys are trained as would-be soldiers, one has nearly committed suicide and another several petty crimes in the nearby town. Mann learns that an overzealous boy officer may have pushed them to the breaking point.
A Scots contingent serves duty in a west German town, but they fight and bully their way amongst the locals. When three of them murder the owner of a pub, Mann must discern who is responsible.
When a soldier dies of exhaustion on a routine hike with pack, The officers above him are at odds with whether he was intentionally overworked or if he was unfit for service to begin with.
When a German civilian is run down by a group of British soldiers in a stolen car, Mann finds out the pressures on the men that pushed them to do it, and those involving the base and it's personnel with local politics.
In West Germany, an officer's suicide leads to a supposed refugee hospital, where almost twenty years after the war, there's few residents, but dangerous drugs in abundance.