Watch 123Movies. In 'Dueling Affair' set against the backdrop of the 19th century. The lives of Henry, James and Isobel become intricately entwined in a web of love, betrayal, and shifting allegiances. Isobel finds herself torn between two men. Grappling with her emotions as secrets come to light and loyalties are put to the test. As tensions escalate, the stage is set for a gripping showdown, marking the dramatic end of dueling in British society.