When Cecilia Lynch falls in love with John Moore, a United Irishman, she finds herself drawn into the web of revolution. The illegitimate daughter of the late Sir Harry Lynch-Blosse stands by her fiance when General Humbert routs the redcoats through Castlebar. Cecilia is jubilant when the Frenchman appoints Moore, formerly of Alicante and the Sorbonne, as President of Connaught within the declared Irish Republic. Their hopes for the future of a free and United Ireland are unrestrained.