Dessa is set between 1908-1936 in England, Assam and South Africa, and its story includes little known aspects of submarine warfare in World War One. Dessa is a girl from a large working class family out to better herself. She exploits Neil's weak character, but despite her engagement to him, feels obliged to marry the sexy intelligent submariner Guy when she becomes pregnant to him. Guy's alcoholism, accentuated by his war experiences, leads to his tragic death. Left with five children, she finally abandons them for a new life with Neil in Assam, raising questions of loyalty and responsibility.