A British war adventure; A story about a group of retired armed forces officers and British businessmen in India who are called upon to deal with the threat the German Navy pose to Allied shipping. Based on James Leasor's book Boarding Party, this commando-style film is based on British wartime missions Operation Postmaster in 1942 and Operation Creek in 1943, combined in a single story. It is a meandering adventure about august men of advancing years in a tale of derring-do. Comedy arises from the cheery, sentimental bravado and patriotism of its over-the-hill characters. It lacks vigour due to its rudimentary plot but it finishes strong with suspense.