Military drama starring Alec Guinness as Major Jock Sinclair, who has been in a Highland regiment since he joined as a boy piper. During the Second World War, as Second-in-Command, he was promoted to Acting Commanding Officer - but now that the regiment has returned to Scotland, a new commanding officer is to be appointed. Jock's disappointment leads him to pit his wits against his new CO - and also to take against his daughter, his girlfriend, and the other officers in the Mess