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.
Detailed to investigate a charge that a soldier in Cyprus is guilty black-market activities - and suspected murder - Sgt Mann finds that he needs his wits about him to track down a determined criminal.
When a regiment returns from Borneo and complains that their unit is being haunted by a ghost, Sgt Mann turns ghostbuster to allay their fears - but investigating ghost stories can prove ill-advised.
In Aden, a tough sergeant badly beats a native boy, enough to hospitalize him. Mann is sent to look into it, but midway through the investigation, the sergeant meets with a deadly accident.
Investigating a difficult case, Sgt Mann finds his movements restrained by 'internal arrangement'. Much to the anger of a superior officer, he skilfully sidesteps his orders - and makes a surprising discovery.
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.
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.
Sgt. Mann's suspicions are aroused when a soldier confesses to a crime he obviously didn't commit. Mann's determination to prove the man's innocence unearths an unusual love interest.
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.