Indo-China 1941, and cruising somewhere off Saigon is the world's largest, most dangerous submarine, the French "Soufriere". The British navy must capture and use her in the defence of Singapore before she is used against them. For Commander Robert Ainslie it is the supreme challenge of hi...

Indo-China 1941, and cruising somewhere off Saigon is the world's largest, most dangerous submarine, the French "Soufriere". The British navy must capture and use her in the defence of Singapore before she is used against them. For Commander Robert Ainslie it is the supreme challenge of his career.